Motorcycle noise control 2025 exhaust fregrel meets biker
Motorcycle noise control 2025 meets bikers with a new exhaust fregrass

New exhaust fregregs 2025 meet bikers - who is really behind it

If regulations are more important than driving pleasure

Since March 2025, new regulations for retrofitting silencers have been in the case of motorcycles in Europe. The decision goes back to the 80th meeting of the UNECE (United Nations Economic Commission for Europe), where international regulations No. 41 and 92 were revised. Objective: In the future, motorcycles should no longer be able to be made so easy by the expansion of DB killers as legally allowed.

Who is behind it?

An international interaction of political and economic actors is responsible for the new regulation:

1.  UNECE - United Nations Economic Commission for Europe

  • Seat: Geneva
  • Official impetus: 80th session of the Grbp specialist group (NOISE & TYRES)
  • Task: Development of technical vehicle regulations-including rule 41 (vehicle noises) and 92 (retrofit silencer)
  • Validity: not only in the EU, but also in Switzerland, Japan, South Korea and partly in the USA

2.  WP.29 - World Forum for the harmonization of vehicle regulations

  • Technical working group of the UNECE
  • Responsible for the global recognition of vehicle standards
  • In March 2025, the new rule was officially validated here

3.  Acem - Association of European motorcycle manufacturers

  • Seat: Brussels
  • Members: UA Harley-Davidson Europe, BMW Motorrad, Ducati, Honda, KTM, Yamaha
  • Goal: Uniform and right-wing retrofit solutions in accordance with the UNECE Type approval in order to relieve the manufacturers of liability risks.
  • Role: Active co -developer of the new rule

4.  IMMA-International Motorcycle Manufacturer Association

  • Worldwide advocacy of the motorcycle industry
  • Participation in an advisory function during development

The EU Commission also plays a major role because it supports the implementation at the national level. In Germany, the topic lies with the Federal Ministry of Digital and Transport (BMDV).

At first glance, this looks like a well -coordinated measure of everyone involved. But from the point of view of many motorcyclists - enclosed me - another question arises:

Harley-Davidson Insurance 2025

Is not over -regulated here?

Sure, manipulation of exhaust systems is not a new topic. For years there have been DIY instructions in the scene, such as DB-Killer removed to make the bike sound. It is nothing new that this is not officially allowed. But instead of checking and targeting outliers, the entire motorcycle community is now being obliged.

The new rules will make it difficult to offer retrofit manufacturers in the future to offer customizable, legally usable exhaust systems. Individuality is slowed down - and in a scene that lives exactly from it.

Why do associations take part in such rules?

1. Industry wants to plan and uniformity

ACEM members such as Harley-Davidson, BMW, Honda, Yamaha & Co. want clear, uniform framework conditions in order to be able to offer their products across the EU across the EU -without having to fight with 27 national regulations.

Example: Better a uniform unec rule for all of Europe, than different decibel limits, TÜV requirements or route closures in every country.

ROKKERTECH STRAIGHT AAA

2. Protection against wild growth in retrofitting products

The manufacturers have been annoyed by "cheap accessories" , that:

  • no real exams goes through
  • can be easily manipulable (e.g. DB killer with Allen screw)
  • ensures complaints, image damage and admission problems

The aim of the associations: Better a controlled, certified retrofit industry that is integrated into the type approval - even if it means less scope for customizing.

3. Acem does not want a flat -rate driving bans

Acem and Imma see what happens in Tyrol, the Black Forest or on Lake Garda: driving bans from 95 dB , sometimes also for admission -compliant serial bikes. ACEM thinks strategically: If we participate early , we can binding, technical solutions - instead of simply making politics tight.

4. Political pressure & "green acceptance"

The motorcycle industry is under pressure: EU emission goals, CO₂ fleet rules, Euro 6e, e-fuel vs. electromobility. For many, steering in noise regulations is a kind of "political fig leaf" to prevent tougher bans in other areas. It is better to help shape your own solution rather than endure an outside , one could say in a simplified manner.

More consideration - but at what price?

Of course, motorcycles shouldn't be rioters. But you should also see how many people are affected by these new regulations, while the origin of the debate is often limited to a few hotspots in the Alps or suburban areas. Instead of regulating with a sense of proportion, it is now being tightened across the board - with the argument that "wanting to make the streets quieter".

Effects for you as a driver:

Does existing protection apply to existing exhaust systems? Yes - basically protection applies! If your exhaust was legally approved before the new regulation , you can continue to use it.

But: You must not change (e.g. removing DB killer), otherwise the operating license goes out → then there may be fine or decommissioning . It is not the old system that is the problem - but a changed system.

What threatens to manipulate or noise pollution?

If you change an exhaust system illegally or are louder than permitted , the following can happen:

  • Fine of up to 80 euros (with noise pollution)
  • Stopping the vehicle (if the operating license is lost)
  • TÜV paddling or deficiency card

B esonly are controls z. B. in Tyrol, South Tyrol, Black Forest, Lechtal and in cities with noise action plans.

Customizing is restricted - but not prohibited

Motorcycle noise control 2025 meets biker with new exhaust ferris 1
Custom

Right: The new rules make it more difficult to design retrofitting output systems individually. Manufacturers have to adhere to strict guidelines- plug-and-play systems with easily removable DB killers are in fact no longer any approval . But: You can continue to install exhaust systems if they meet the new regulations - many providers such as Jekill & Hyde, Kesstech or Penzl already adapt their products accordingly.

Penzl, for example, offers the ELO armoring kit, which enables mechanically adjustable PM exhaust systems to convert to electronic control. This system is suitable for motorcycles with a CAN bus or diagnostic plug of the Harley-Davidson brands and has an EC operating license. 

Why was the whole thing toast?

1. Increasing symptoms from the population

  • Many citizens - especially in tourist Alpine regions (Austria, Germany, Switzerland, Italy) - have complained about loud motorcycles
  • In places such as Seefeld, Kochel, Lechtal, Timmelsjoch or Tyrol, there were already driving bans at over 95 dB stand noise

2. Political pressure from environmental associations and municipalities

  • Examples: German City Day, VCD, BUND, noise league
  • These groups raised noise as an environmental problem - similar to fine dust or CO₂

3. Technical progress in silencers

So authorities say: why then tolerate manipulation? Today, industry can build quieter exhaust systems without at least lost performance.

My opinion!

And what about the streets itself?

In my eyes, the potholes, bitumen strips and at 30 km/h are only much louder than any exhaust for motorcyclists that have not been repaired for years. Security begins in the condition of the street. If you are traveling often and a lot, you will quickly notice: the focus is often no longer on the essential.

Instead of guiding bikers because of a few decibels, one should rather ensure that roads remain safe - for everyone. The fact that some sections with poor road surfaces are more reminiscent of off-road tours seems to have slipped far down in the list of priorities.

The new anti-manipulation control for exhaust systems is another step towards more regulation in the motorcycle area. Anyone who deals intensively with customizing will feel this clearly. It remains to be seen whether the measure really ensures more calm - or just limits individuality and driving fun.

What we need instead is a fair compensation: consideration yes, but please with a sense of proportion. And above all: investments in safe and functioning street infrastructure - instead of always new rules on paper.

Text & Image: Harleysite - errors and changes reserved.


Jack's Inn 54

latest news

Insolvency report Custom Chrome Europe - Stand of the trade fair with accessories and motorcycles

Custom Chrome Europe submits bankruptcy application

Custom Chrome Europe submits bankruptcy application to the responsible district court in Bingen on ...
Custombike at a US show as an indication of the planned annual main inspection in the EU

EU is not planning an annual main inspection of motorcycles for the time being

The EU is planning a main inspection for a few vehicles. Motorcycles ...
Motorcycle noise control 2025 exhaust fregrel meets biker

Motorcycle noise control 2025 meets bikers with a new exhaust fregrass

Motorcycle noise control 2025 brings new exhaust regulations. Why the DB killer regulation for ...
Harley-Davidson racing team at the 1000 km race in Hockenheim 2025

Harley-Davidson started in Hockenheim

Harley-Davidson rocks the 1,000 km from Hockenheim with performance excavators, sportser ...
Andermatt Freedom Ride

Harley-Davidson event in Andermatt-Freedom Ride 2025

Harley-Davidson event in Switzerland: the Andermatt Freedom Ride 2025 ...
Biker talk on Monday evening on Harleysite YouTube

Biker-Talk Livestream on Monday-today from 7:00 p.m. on Harleysite

Biker-Talk, Community issues, review & winnings-today from 7 p.m.
Harley-Davidson leadership crisis-investors vs. board member

Harley-Davidson leadership crisis-now the brand needs real leadership

Harley-Davidson leadership crisis-investors vs. board management management in the head-...
Lahn River Chapter in Harley Security Training with Ralle

Lahn River Chapter starts the season with Harley security training

First driving safety training with Ralle on the site of Edeka Pfeiffer ...
Harley-Unterweg! Tent or hotel

Harley on the go - tent or hotel?

Camping or hotel? -What really ...
Spring Open House April 2025

Open House Dates at the Harley-Davidson Contract dealers

Open House appointments at the Harley-Davidson Contract dealers in April 2025 ...
Harley-Davidson is thinking about the sale of HDFs-a billion-dollar deal is in the room. The motorcycle manufacturer wants to concentrate more on the core business. CEO Jochen Zeitz could also benefit.

Harley-Davidson checks the sale of his financial division

Harley-Davidson apparently plans to sell his financial division HDFS for ...

Harley-Davidson Low Rider St with chrome exhaust from Dr. Jekill & Mr. Hyde
Dr. Jekill & Mr. Hyde starts pre -order for HD Cruiser 2025

Dr. Jekill & Mr. Hyde starts pre -order for HD Cruiser 2025

Dr. Jekill & Mr. Hyde starts pre-orders for exhaust systems for the 2025 Harley-Davidson Cruiser 2-1 models and delivers the Grand American Touring exhaust systems.

Harley-Davidson Low Rider S with black slip-on exhaust from Dr. Jekill & Mr. Hyde
Powerful look, robust sound-the new slip-on from Jekill & Hyde for the 2025 Low Rider S.

The new travel season is in full swing, and the exhaust manufacturer Dr. Jekill & Mr. Hyde has announced that the pre-orders for the brand new exhaust systems of the 2025 Harley-Davidson Cruiser models are now officially opened. But that's not all - exhaust systems for the 2025 Grand American Touring series are now available and are being delivered.

Pre-order for HD cruiser models

The brand new slip-ons for Harley-Davidson Cruiser 2-in-1 systems can now be pre-ordered and are designed for the following models:

The perfect combination: sound & design

The exhaust systems from Dr. Jekill & Mr. Hyde are designed so that they can be seamlessly integrated Harley-Davidson They are available in a high -quality black version that corresponds to the factory look, or in classic chrome for drivers who prefer a timeless shine. The 4.0-inch slip-on design is somewhat shorter than the original and improves the silhouette of the motorcycle, while it delivers the deep sophisticated sound that Dr. Jekill & Mr. Hyde distinguishes.

Harley-Davidson Low Rider S with black slip-on exhaust from Dr. Jekill & Mr. Hyde
Powerful look, robust sound-the new slip-on from Jekill & Hyde for the 2025 Low Rider S.

Thanks to the three-modes technology, drivers can change seamlessly while driving-from a quiet whisper to a strong, powerful roar-and thus adapt to every driving situation. Three different end caps (Big Shot, Streetfighter and Slashcut) give each system an individual touch and enable drivers to express their personal style. 

Harley-Davidson Heritage Classic 2025 with black slip-on by Dr. Jekill & Mr. Hyde
Classic meets modern - with electronically adjustable exhaust for the new Heritage.

Grand American Touring: Starting exhaust deliveries

In addition to the cruiser models, Dr. To announce Jekill & Mr. Hyde that the exhaust systems for the 2025 Harley-Davidson Grand American Touring models are now officially available. After a successful pre -order phase, these systems are ready for delivery - and offer drivers the opportunity to use the premium electronically adjustable exhaust from Dr. To upgrade Jekill & Mr. Hyde.

Developed to improve both the sound and the design on the street, the Touring systems offer the same state-of-the-art technology, conformity with the R41.05 regulations and the distinctive Dr. Jekill & Mr. Hyde Sound.

Text & image credit: Dr. Jekill & Mr Hyde


Harley-Davidson Hamburg North

latest news

Insolvency report Custom Chrome Europe - Stand of the trade fair with accessories and motorcycles

Custom Chrome Europe submits bankruptcy application

Custom Chrome Europe submits bankruptcy application to the responsible district court in Bingen on ...
Custombike at a US show as an indication of the planned annual main inspection in the EU

EU is not planning an annual main inspection of motorcycles for the time being

The EU is planning a main inspection for a few vehicles. Motorcycles ...
Motorcycle noise control 2025 exhaust fregrel meets biker

Motorcycle noise control 2025 meets bikers with a new exhaust fregrass

Motorcycle noise control 2025 brings new exhaust regulations. Why the DB killer regulation for ...
Harley-Davidson racing team at the 1000 km race in Hockenheim 2025

Harley-Davidson started in Hockenheim

Harley-Davidson rocks the 1,000 km from Hockenheim with performance excavators, sportser ...
Andermatt Freedom Ride

Harley-Davidson event in Andermatt-Freedom Ride 2025

Harley-Davidson event in Switzerland: the Andermatt Freedom Ride 2025 ...
Biker talk on Monday evening on Harleysite YouTube

Biker-Talk Livestream on Monday-today from 7:00 p.m. on Harleysite

Biker-Talk, Community issues, review & winnings-today from 7 p.m.
Harley-Davidson leadership crisis-investors vs. board member

Harley-Davidson leadership crisis-now the brand needs real leadership

Harley-Davidson leadership crisis-investors vs. board management management in the head-...
Lahn River Chapter in Harley Security Training with Ralle

Lahn River Chapter starts the season with Harley security training

First driving safety training with Ralle on the site of Edeka Pfeiffer ...
Harley-Unterweg! Tent or hotel

Harley on the go - tent or hotel?

Camping or hotel? -What really ...
Spring Open House April 2025

Open House Dates at the Harley-Davidson Contract dealers

Open House appointments at the Harley-Davidson Contract dealers in April 2025 ...
Harley-Davidson is thinking about the sale of HDFs-a billion-dollar deal is in the room. The motorcycle manufacturer wants to concentrate more on the core business. CEO Jochen Zeitz could also benefit.

Harley-Davidson checks the sale of his financial division

Harley-Davidson apparently plans to sell his financial division HDFS for ...

CVO Road Glide ST Drjekill & Mr. Hyde
DR. JEKILL & MR. Hyde for Grand American Touring 2025 

DR. JEKILL & MR. Hyde for Grand American Touring 2025

Dr. Jekill & Mr. Hyde announces the start of the pre-orders for Harley-Davidson Grand American Touring models known

With the upcoming motorcycle season, The Jekill & Hyde Company to agree that the pre -orders for their state -of -the -art, electronically adjustable exhaust systems have now opened. These were specially developed for the latest Harley-Davidson Grand American Touring models. Drivers can secure their system for the 2025 season and enjoy a completely new sound and driving experience.

 // DR. JEKILL & MR. Hyde for Grand American Touring 2025
The specifically developed exhaust systems from Dr. Jekill & Mr. Hyde can now be pre-ordered for the following 2025 Harley-Davidson Grand American Touring models:

These exhaust systems, known for their high-quality workmanship and innovative technology, guarantee Harley-Davidson drivers an incomparable sound experience. At the push of a button you can enjoy the perfect balance between sound and performance.

// R41.05 & new innovative technology 

Our systems are supplied with new software and hardware to ensure compliance with the R41.05 regulations. We have invested in our own state -of -the -art test laboratory, which is equipped with the latest and advanced test devices and methods in order to offer our customers the ultimate sound experience.

Our innovative technology, including the new active smartbox and the rapidly reacting flap, not only guarantees an improved sound experience, but also future -proof engineering. In conformity with the latest euro standards and supported by a 4-year guarantee, our exhaust system reflects the unmistakable quality and craftsmanship of Dr. Jekill & Mr. Hyde again.

 // More Harley-Davidson models
While the pre-orders are currently open to the Grand American Touring models , The Jekill & Hyde Company is working intensively to make their exhaust systems available for other Harley Davidson models. Updates follow as soon as new models are available.

Text & photo certificate: Jekyll & Hyde

Harley-Davidson Kohl - Aachen Winter Sale

latest news

Insolvency report Custom Chrome Europe - Stand of the trade fair with accessories and motorcycles

Custom Chrome Europe submits bankruptcy application

Custom Chrome Europe submits bankruptcy application to the responsible district court in Bingen on ...
Custombike at a US show as an indication of the planned annual main inspection in the EU

EU is not planning an annual main inspection of motorcycles for the time being

The EU is planning a main inspection for a few vehicles. Motorcycles ...
Motorcycle noise control 2025 exhaust fregrel meets biker

Motorcycle noise control 2025 meets bikers with a new exhaust fregrass

Motorcycle noise control 2025 brings new exhaust regulations. Why the DB killer regulation for ...
Harley-Davidson racing team at the 1000 km race in Hockenheim 2025

Harley-Davidson started in Hockenheim

Harley-Davidson rocks the 1,000 km from Hockenheim with performance excavators, sportser ...
Andermatt Freedom Ride

Harley-Davidson event in Andermatt-Freedom Ride 2025

Harley-Davidson event in Switzerland: the Andermatt Freedom Ride 2025 ...
Biker talk on Monday evening on Harleysite YouTube

Biker-Talk Livestream on Monday-today from 7:00 p.m. on Harleysite

Biker-Talk, Community issues, review & winnings-today from 7 p.m.
Harley-Davidson leadership crisis-investors vs. board member

Harley-Davidson leadership crisis-now the brand needs real leadership

Harley-Davidson leadership crisis-investors vs. board management management in the head-...
Lahn River Chapter in Harley Security Training with Ralle

Lahn River Chapter starts the season with Harley security training

First driving safety training with Ralle on the site of Edeka Pfeiffer ...
Harley-Unterweg! Tent or hotel

Harley on the go - tent or hotel?

Camping or hotel? -What really ...
Spring Open House April 2025

Open House Dates at the Harley-Davidson Contract dealers

Open House appointments at the Harley-Davidson Contract dealers in April 2025 ...
Harley-Davidson is thinking about the sale of HDFs-a billion-dollar deal is in the room. The motorcycle manufacturer wants to concentrate more on the core business. CEO Jochen Zeitz could also benefit.

Harley-Davidson checks the sale of his financial division

Harley-Davidson apparently plans to sell his financial division HDFS for ...
a close up of a motorcycle
MEC GmbH “KessTech” – A step into the future

MEC GmbH “KessTech” – A step into the future

Throughout its company history, MEC GmbH “KessTech” has always established itself as an innovative and reliable partner for high-quality flap exhaust systems. In the midst of the current economic challenges, the company has now taken a decisive step to secure its future and emerge stronger from the situation: the initiation of preliminary self-administration proceedings in accordance with Section 270b.

Harley Factory Group 2022

Stability and Control: What the Procedure Means

Through the self-administration process, MEC GmbH retains full control over all business processes. It enables the company to actively implement stabilization and long-term restructuring measures. The ability to deliver remains unrestricted: production and delivery continue to take place on time and in the usual quality.

Guarantee services and warranty claims are also fully covered - a clear signal of reliability and stability that customers can rely on.

The challenges and planned measures

The step was necessary in order to successfully cope with the economic burdens caused by outstanding liabilities from a company takeover, a sluggish expansion strategy and problems in the supply chains.

The planned measures include:

Reorganization of the financing structure: The goal is sustainable debt relief.

Reorganization of sales: The dealer structure is to be optimized, particularly in the “Customizing Harley-Davidson” area.

Expansion of foreign markets: New markets are to be developed through cooperation with general importers and distributors.

The stated goal: The adoption of an insolvency plan that sustainably reduces and revitalizes the company.

A strong promise for the future

MEC GmbH looks ahead optimistically. With high-quality, legal and innovative products, the company remains a reliable partner for its customers.

Questions or uncertainties? The company is available to answer any questions at any time and is convinced that it can successfully pursue this path together with the support of its community.


MEC GmbH “KessTech” - A step into the future 13

Thomas Uppenbrink & Collegen GmbH, Hagen

Klepper and Partner Rechtsanwälte PartGmbH, Hagen

Provisional administrator:

Dr. Jan Plathner, Frankfurt/Main

MEC GmbH is doing everything it can to sustainably strengthen its market position and, as one of the leading providers, to continue setting the standards in the field of flap exhaust systems.


Müller Motorcycles Hydro Clutch

latest news

Insolvency report Custom Chrome Europe - Stand of the trade fair with accessories and motorcycles

Custom Chrome Europe submits bankruptcy application

Custom Chrome Europe submits bankruptcy application to the responsible district court in Bingen on ...
Custombike at a US show as an indication of the planned annual main inspection in the EU

EU is not planning an annual main inspection of motorcycles for the time being

The EU is planning a main inspection for a few vehicles. Motorcycles ...
Motorcycle noise control 2025 exhaust fregrel meets biker

Motorcycle noise control 2025 meets bikers with a new exhaust fregrass

Motorcycle noise control 2025 brings new exhaust regulations. Why the DB killer regulation for ...
Harley-Davidson racing team at the 1000 km race in Hockenheim 2025

Harley-Davidson started in Hockenheim

Harley-Davidson rocks the 1,000 km from Hockenheim with performance excavators, sportser ...
Andermatt Freedom Ride

Harley-Davidson event in Andermatt-Freedom Ride 2025

Harley-Davidson event in Switzerland: the Andermatt Freedom Ride 2025 ...
Biker talk on Monday evening on Harleysite YouTube

Biker-Talk Livestream on Monday-today from 7:00 p.m. on Harleysite

Biker-Talk, Community issues, review & winnings-today from 7 p.m.
Harley-Davidson leadership crisis-investors vs. board member

Harley-Davidson leadership crisis-now the brand needs real leadership

Harley-Davidson leadership crisis-investors vs. board management management in the head-...
Lahn River Chapter in Harley Security Training with Ralle

Lahn River Chapter starts the season with Harley security training

First driving safety training with Ralle on the site of Edeka Pfeiffer ...
Harley-Unterweg! Tent or hotel

Harley on the go - tent or hotel?

Camping or hotel? -What really ...
Spring Open House April 2025

Open House Dates at the Harley-Davidson Contract dealers

Open House appointments at the Harley-Davidson Contract dealers in April 2025 ...
Harley-Davidson is thinking about the sale of HDFs-a billion-dollar deal is in the room. The motorcycle manufacturer wants to concentrate more on the core business. CEO Jochen Zeitz could also benefit.

Harley-Davidson checks the sale of his financial division

Harley-Davidson apparently plans to sell his financial division HDFS for ...

The Sabina test robot from Dr. Jekill & Mr. Hyde simulates driving conditions for exhaust systems.
Euro 5+ for motorcycles simply explained


Euro 5+ for motorcycles – everything you need to know at a glance

From 2025, the Euro 5+ standard will be mandatory for motorcycles. This further development builds on the Euro 5 requirements introduced in 2020 and brings stricter rules for emissions monitoring and the durability of systems such as catalytic converters. The objective: fewer emissions in the long term and more sustainable use of technology. But how exactly do these changes affect us drivers? What are the requirements and what should you prepare for? Here are the most important facts and background.

Euro 5+ – Why an extension of the existing standard?

The evolution from Euro 4 to Euro 5 and now to Euro 5+

Since 1999, the EU has been pursuing the goal of reducing pollutant emissions from vehicles with the so-called Euro standards. For motorcycles, Euro 4 (from 2016) was a major turning point with significantly stricter limits for nitrogen oxides (NOx) and carbon monoxide (CO). Euro 5, introduced in 2020, continued these requirements, with even stricter limits for all types of emissions.

Euro 5+ goes one step further: instead of just limiting emissions, the technology is questioned. Do emissions control systems really last the entire lifespan of a motorcycle? How can you ensure that the limit values ​​are also adhered to in real driving operations?

This is where Euro 5+ comes in – with stricter testing procedures and expanded monitoring of emissions-related systems.

Custombike Show 2025 - Bad Salzuflen motorcycle fair

The Sabina test robot from Dr. Jekill & Mr. Hyde simulates driving conditions for exhaust systems.

The Sabina test robot from Dr. Jekill & Mr. Hyde simulates driving conditions for exhaust systems.

The three central innovations in Euro 5+

1. Onboard Diagnostics II (OBD II)

Motorcycles must be equipped with a more advanced onboard diagnostic system that continuously monitors the function of emissions-related components. This means that problems such as a defective catalytic converter can be identified early. The driver is informed of malfunctions before higher emissions occur.

2. Long-term durability of exhaust gas purification systems

Manufacturers must prove that catalytic converters and other emissions-related components function throughout the entire lifespan of a motorcycle - not just on the test bench, but also in real driving conditions.

3. More realistic noise testing

The limit values ​​for driving noise remain at 77 dB(A), but the test methods are adjusted so that they better reflect real driving situations. The aim is to ensure that motorcycles remain quiet in everyday life - without losing the character of a bike.

What does Euro 5+ mean specifically for motorcyclists?

Purchasing decisions – what awaits you?

New purchases: Motorcycles that are newly registered from 2025 must meet the Euro 5+ standard. For us drivers, this means more modern technology, but also potentially higher acquisition costs.

Existing vehicles: Models registered before 2025 are not affected by the new regulations. So you can continue to drive your current motorcycle without restrictions.

Technology and maintenance – what changes

The more advanced exhaust systems and the new OBD II could ensure that maintenance becomes more precise, but also more complex. Repair costs could increase, especially if there are defects in catalytic converters or sensors. Positive: Such problems are detected early by the diagnostic system, which can prevent consequential damage.

Rick's Motorcycles online shop

Euro 5+ for motorcycles simply explained 2
Euro 5+ for motorcycles simply explained 92

Dr. Jekill & Mr. Hyde – Innovation meets new norms

A good example of how manufacturers react to emissions regulations is Dr. Jekill & Mr Hyde. They are known for their electronically adjustable exhaust systems, which both meet legal requirements and maintain driving pleasure.

For Euro 5, for example, they have developed an O₂ sensor extender that sits between the body and the end cap of the system and continuously monitors the exhaust gas values. This ensures that regulations are met without losing the typical sound.

It is to be expected that they will again develop solutions for Euro 5+, or have even already developed them. At the European Bike Week, Dr. Jekill & Mr. Hyde first insights into their new approaches to how modern exhaust systems can meet the stricter requirements without compromising on quality or driving experience. Technologies were presented that not only meet the strict requirements of the Euro 5+ standard, but also simulate real driving operations to ensure maximum reliability and efficiency.

Euro 5+ for motorcycles simply explained 3
Euro 5+ for motorcycles simply explained 93

What was particularly impressive was the use of their Sabina test robot, which recreates driving operations under realistic conditions in order to test the systems for longevity and efficiency. At the same time, the company emphasized that they do not lose sight of the needs of their customers - especially those who continue to expect the characteristic sound and special driving experience of a Harley-Davidson.

This balance between legal requirements and drivers' expectations impressively shows how technological innovation and the preservation of tradition can go hand in hand.

Open House on April 25, 2025, at Harley-Davidson Münsterland

Sabina test robot – realistic testing of exhaust systems.

Sabina test robot – realistic testing of exhaust systems.

What does the future hold – the outlook for Euro 6

Euro 5+ is not the end of development. There are already discussions about the introduction of Euro 6, which may come in 2028. This could lead to further tightening of emissions and driving noise. There are also topics such as the electrification of motorcycles and safety requirements (e.g. ABS requirement for light motorcycles).

For us drivers the question remains: What is the balance between driving pleasure and regulation? It is clear that the coming years will be exciting – both from a technical perspective and for the market.

Summary: What you need to know now

Euro 5+ applies to all new registrations from 2025.

The standard expands the existing Euro 5 requirements with more stringent testing and monitoring.

Existing vehicles are not affected.

You can continue to ride your current motorcycle as usual.

New vehicles without Euro 5+

New vehicles without Euro 5+ should be registered in 2024, if at all it will be very time-consuming to get your vehicle registered. The authorized dealers will have to work with daily registrations. There are limited exceptions for manufacturers when carrying inventory into the new year. The rules are different here; if the manufacturer itself carries out a daily registration, according to my information, the vehicle is still considered a new vehicle for the current year. It will also be possible to buy a Sport Glide, for example, in 2025. Contrary to previous information, there will still be Sport Glide and Fat Bob models in 2025.

The new systems offer advantages, but also bring challenges.

Advanced exhaust technology ensures cleaner values ​​and lower emissions, but could make maintenance more complex.

The future remains in motion.

Euro 6 and electrification could further change the market. Anyone planning a new motorcycle should keep an eye on developments.


Harleysite. Compiled to the best of our knowledge. This is a very complex topic and despite careful research, errors cannot be ruled out.

Harley Hamburg South

latest news

Insolvency report Custom Chrome Europe - Stand of the trade fair with accessories and motorcycles

Custom Chrome Europe submits bankruptcy application

Custom Chrome Europe submits bankruptcy application to the responsible district court in Bingen on ...
Custombike at a US show as an indication of the planned annual main inspection in the EU

EU is not planning an annual main inspection of motorcycles for the time being

The EU is planning a main inspection for a few vehicles. Motorcycles ...
Motorcycle noise control 2025 exhaust fregrel meets biker

Motorcycle noise control 2025 meets bikers with a new exhaust fregrass

Motorcycle noise control 2025 brings new exhaust regulations. Why the DB killer regulation for ...
Harley-Davidson racing team at the 1000 km race in Hockenheim 2025

Harley-Davidson started in Hockenheim

Harley-Davidson rocks the 1,000 km from Hockenheim with performance excavators, sportser ...
Andermatt Freedom Ride

Harley-Davidson event in Andermatt-Freedom Ride 2025

Harley-Davidson event in Switzerland: the Andermatt Freedom Ride 2025 ...
Biker talk on Monday evening on Harleysite YouTube

Biker-Talk Livestream on Monday-today from 7:00 p.m. on Harleysite

Biker-Talk, Community issues, review & winnings-today from 7 p.m.
Harley-Davidson leadership crisis-investors vs. board member

Harley-Davidson leadership crisis-now the brand needs real leadership

Harley-Davidson leadership crisis-investors vs. board management management in the head-...
Lahn River Chapter in Harley Security Training with Ralle

Lahn River Chapter starts the season with Harley security training

First driving safety training with Ralle on the site of Edeka Pfeiffer ...
Harley-Unterweg! Tent or hotel

Harley on the go - tent or hotel?

Camping or hotel? -What really ...
Spring Open House April 2025

Open House Dates at the Harley-Davidson Contract dealers

Open House appointments at the Harley-Davidson Contract dealers in April 2025 ...
Harley-Davidson is thinking about the sale of HDFs-a billion-dollar deal is in the room. The motorcycle manufacturer wants to concentrate more on the core business. CEO Jochen Zeitz could also benefit.

Harley-Davidson checks the sale of his financial division

Harley-Davidson apparently plans to sell his financial division HDFS for ...

Dr. Jekill & Mr. Hyde - Revolutionary sound for Harley-Davidson
Dr. Jekill & Mr. Hyde – Revolutionary sound for Harley-Davidson motorcycles!

Revolutionary technology for the ultimate driving pleasure: Dr. Jekill & Mr. Hyde and the sound of the future

Content overview:

Almost everyone who thinks of Harley-Davidson thinks of the unmistakable sound of these machines. And although many love this sound more than anything else in the world, every few years it becomes more difficult for the motorcyclist to enjoy this sound.  

Jekill and Hyde Street Glide Sharkskin Blue
Jekill and Hyde Street Glide Sharkskin Blue

With new rules and regulations, the best thing we can do is cruise along the highway quietly like a mouse without our beloved blubber as a suitable soundtrack. 

Valve exhaust manufacturer Dr. Jekill & Mr. Hyde offers the solution to thousands of drivers with their electronically adjustable exhaust systems, giving drivers the optimal sound without the risk of ending up on the wrong side of the law.

But with new agreements like R41.05 and Euro5+, the voices are getting louder and louder that flap exhaust systems are now over... but is that really the case? 

DEEMEED Motorcycle Bags and Accessories - Harleysite Coupon

Euro5+ and R41.05 - what does that mean?

First the facts: What do the new regulations mean?
Of course there are pages full of technical language written about it, but we'll summarize it briefly. Euro5+ is the current regulation for emissions controls and requires vehicles to meet strict criteria for harmful emissions. These provisions are essential to reduce environmental impacts and promote a more sustainable future; Criteria already outlined by Dr. Jekill & Mr. Hyde are fulfilled.

R41.05 is different because it concerns the noise regulation of motorcycles and is intended to reduce noise pollution. These regulations require that motorcycles remain below a certain decibel level at speeds between 10 and 100 km/h. These regulations apply to new motorcycles in the EU, as well as to previously registered motorcycles that are newly registered.

Dr. Jekill & Mr. Hyde offers the solution to stricter legislation

In order to write a program under these conditions that still offers the driver the ideal sound and is legal, a system must go through countless test runs and drives in order to perfectly match the software to the exhaust system. In short: it is almost impossible for a human being made of flesh and blood to achieve this.

Introducing Sabrina

To ensure that the new Dr. To ensure that Jekill & Mr. Hyde systems comply with R41.05 regulations, the exhaust manufacturer, headquartered in the Netherlands, has invested in a state-of-the-art testing laboratory. In a closed room with several microphones and the latest sound software, all bikes and their exhaust systems are tested and checked to the utmost.

a motorcycle in a room
The new CVO 121 Street Glide in the Jekill & Hyde test laboratory.

At the center of this testing process is a robot named Sabrina. It continuously carries out emission and sound measurements as well as endurance tests under the highest precision conditions. Thanks to it, a revolutionary flap system could be developed that adapts to driving behavior to maintain the optimal sound level and offer a constant sound experience within legal limits.

VIDEO - MEET SABRINA THE TEST ROBOT - Dr. JEKILL & Mr HYDE

For this purpose, a completely new Smartbox (the brain of a Dr. Jekill & Mr. Hyde system) was developed, as well as servomotors that react at lightning speed. Since the software now has to intervene more often, this should not be perceived as a nuisance for the driver. Thanks to the new actuators, the flap can now be positioned in many more positions than before, so the ride still feels very 'smooth'.  

Without these testing facilities and technologies, it would be virtually impossible to develop a legal exhaust that both meets R41.05 standards and offers a high quality sound experience. Therefore, Dr. Jekill & Mr. Hyde is the only manufacturer of adjustable exhaust systems in the world that can provide the optimal sound through this combination of advanced technology, robotics and state-of-the-art testing infrastructure.

Mdag Messebau - We rock it!

New exhaust system for Harley-Davidson CVO 121 models

CVO 121 Harley-Davidson with Jekill and Hyde flap exhaust system
CVO 121 Harley-Davidson with Jekill and Hyde flap exhaust system

Thanks to the new technology and Sabrina, it's Dr. Jekill & Mr. Hyde managed to create a perfectly fitting exhaust for the new HD CVO 121 models. Which is of course legal and, despite new strict rules, still offers the driver the ultimate driving experience.

This technology is of course also used for all other new models such as the 117 Tourer, Sportster S and Nightster, making Dr. Jekill & Mr. Hyde more than ready for the future. So if you thought it was the end of the flap exhaust... you thought wrong!

Text & image credit: Dr. Jekill & Mr Hyde  

SPECIAL PREMIUM EVENTS

House of Flames
Harley Davidson and Dr. Jekill & Mr. Hyde have officially partnered with each other to bring the rider the ultimate sound of freedom.
HARLEY-DAVIDSON – DR. JEKILL & MR. HYDE

HARLEY-DAVIDSON – DR. JEKILL & MR. HYDE

Harley-Davidson Jekill & Hyde

Breaking news!  Harley-Davidson® and Dr. Jekill & Mr. Hyde have officially partnered with each other to bring the rider the ultimate sound of freedom. The street-legal, electronically adjustable exhaust systems are available as official aftermarket products at authorized Harley-Davidson® dealers throughout EMEA.

This collaboration extends across a network of all distribution points in the diverse regions of Europe, the Middle East and Africa. Read the official announcement from Harley-Davidson and Dr. Jekill & Mr. Hyde below.

Thunderbike Harley Davidson

X OFFICIAL   ANNOUNCEMENT 

Dr.
Jekill & Mr. Hyde officially authorized aftermarket exhaust system for Harley-Davidson EMEA!

The Jekill and Hyde Company is pleased to announce that it will be working even more closely with Harley-Davidson to offer innovative exhaust technology for customers looking for the ultimate riding experience.

All authorized Harley-Davidson dealers in Europe, the Middle East and Africa can purchase the Dr. Sell ​​Jekill & Mr. Hyde exhaust products as an official aftermarket product. The street-legal, electronically adjustable exhaust systems from Dr. Jekill & Mr. Hyde can be used on all Harley-Davidson® models.

Both companies will continue to work closely together to bring new exhaust products to market quickly, building on the success of previous collaborations including the LUX exhaust for the Harley-Davidson Nightster®.

2023 House Of Thunder Harley-Davidson Lübeck

latest news

Insolvency report Custom Chrome Europe - Stand of the trade fair with accessories and motorcycles

Custom Chrome Europe submits bankruptcy application

Custom Chrome Europe submits bankruptcy application to the responsible district court in Bingen on ...
Custombike at a US show as an indication of the planned annual main inspection in the EU

EU is not planning an annual main inspection of motorcycles for the time being

The EU is planning a main inspection for a few vehicles. Motorcycles ...
Motorcycle noise control 2025 exhaust fregrel meets biker

Motorcycle noise control 2025 meets bikers with a new exhaust fregrass

Motorcycle noise control 2025 brings new exhaust regulations. Why the DB killer regulation for ...
Harley-Davidson racing team at the 1000 km race in Hockenheim 2025

Harley-Davidson started in Hockenheim

Harley-Davidson rocks the 1,000 km from Hockenheim with performance excavators, sportser ...
Andermatt Freedom Ride

Harley-Davidson event in Andermatt-Freedom Ride 2025

Harley-Davidson event in Switzerland: the Andermatt Freedom Ride 2025 ...
Biker talk on Monday evening on Harleysite YouTube

Biker-Talk Livestream on Monday-today from 7:00 p.m. on Harleysite

Biker-Talk, Community issues, review & winnings-today from 7 p.m.
Harley-Davidson leadership crisis-investors vs. board member

Harley-Davidson leadership crisis-now the brand needs real leadership

Harley-Davidson leadership crisis-investors vs. board management management in the head-...
Lahn River Chapter in Harley Security Training with Ralle

Lahn River Chapter starts the season with Harley security training

First driving safety training with Ralle on the site of Edeka Pfeiffer ...
Harley-Unterweg! Tent or hotel

Harley on the go - tent or hotel?

Camping or hotel? -What really ...
Spring Open House April 2025

Open House Dates at the Harley-Davidson Contract dealers

Open House appointments at the Harley-Davidson Contract dealers in April 2025 ...
Harley-Davidson is thinking about the sale of HDFs-a billion-dollar deal is in the room. The motorcycle manufacturer wants to concentrate more on the core business. CEO Jochen Zeitz could also benefit.

Harley-Davidson checks the sale of his financial division

Harley-Davidson apparently plans to sell his financial division HDFS for ...
KessTech-Pro-Line flap exhaust system
KessTech Pro-Line: Revolution in motorcycle accessories with an 8-year guarantee

KessTech Pro-Line: Revolution in motorcycle accessories with an 8-year guarantee

There is an exciting new product from KessTech that will make the heart of every biker who likes good sound beat faster: the KessTech Pro-Line . This new product line promises not only impressive quality, but also exclusive features that will take your driving experience to a new level.

40 years of KessTECH

For the company's 40th anniversary in 2024, KessTech the Pro-Line product line, which is available for Harley-Davidson and Indian models with Euro 4 and Euro 5. Customers who have their Pro-Line flap exhaust system installed by a specialist dealer receive a standard guarantee of 4 years.

Through a simple and free online registration, this guarantee can be extended by a further 4 years, giving a total of 8 years of guarantee on the system. Further information is available directly on the KessTech website .

8-year guarantee 1 : The KessTech Pro-Line sets new standards in terms of longevity and trust. With an extended warranty of 8 years, KessTech shows its commitment to quality and customer satisfaction. This is a clear signal that they stand behind their products and offer long-term security to their customers.

Special Features: Mode Save – A highlight of the Pro-Line is the “Mode Save” function . This allows you to save your preferred settings and activate them automatically every time you start your motorcycle. A feature that is not only convenient, but also takes your personal preferences into account. Other innovative features that improve usability and driving experience.

Your opinion on flap exhaust systems.

KessTech Pro-Line Street Glide ST 117
KessTech Pro-Line Street Glide ST 117

Individual styles:

KessTech understands that individuality plays a big role in biker life. Therefore, the Pro-Line various customization options, including luxurious 24K gold end caps . These options allow every rider to add a personal touch to their Harley-Davidson.

The KessTech Pro-Line is more than just an extension of the range - it is a tribute to the needs and wishes of the motorcycle community. With the combination of a long warranty, innovative features and individual style options, KessTech sets new standards in the world of motorcycle accessories. Anyone who drives their Harley-Davidson for a longer period of time or would like to sell it during this time has the benefit of an 8-year warranty with the Pro-Line system after registration.

Information from KessTech GmbH / Text: Harleysite Photo credit: KessTech

  1. Customers who have their Pro-Line flap exhaust system installed by a specialist dealer receive a standard guarantee of 4 years. Through a simple and free online registration, this guarantee can be extended by a further 4 years, giving a total of 8 years of guarantee on the system. ↩︎

Mallorca Bike Week 2022

FXDR - Porsche KessTech
KessTech and Cult-Werk will present themselves together at the Hamburg Harley Days 2023

KessTech and Cult-Werk will present themselves together at the Hamburg Harley Days 2023

Hamburg, May 10, 2023 - The renowned companies KessTech and Cult-Werk are pleased to announce that they are joining forces and will be present together at this year's Hamburg Harley Days. The event will take place from May 19th to 21st, 2023 and is considered one of the largest Harley-Davidson events in Europe.

KessTech is known worldwide for the production of electronic exhaust systems for motorcycles. KessTech's innovative technologies allow riders to customize the sound and performance of their motorcycle at the touch of a button. With their wide product range, ranging from cruiser to sports motorcycles, KessTech has established itself as a trustworthy partner in the motorcycle industry.

Breakout Nado KessTech
Breakout Nado KessTech

Cult-Werk is a renowned company that specializes in the production of high quality custom parts. The core competence lies in the production of many parts made of ABS plastic! No other manufacturer in this category in Europe can offer this.

With a talented team of designers and craftsmen, Cult-Werk creates custom motorcycles that reflect the personality and style of their owners. Every Cult-Werk motorcycle is a handcrafted masterpiece that embodies the highest quality and exclusivity.

The cooperation between KessTech and Cult-Werk at the Hamburg Harley Days 2023 promises an impressive presentation of innovation and craftsmanship. Visitors have the opportunity to experience the latest exhaust systems from KessTech and be inspired by the fascinating custom bikes from Cult-Werk. In addition, experts from both companies will be on site to answer questions and explain their products and services to visitors.

The Hamburg Harley Days attract thousands of motorcycle enthusiasts from all over the world every year. The three-day event offers a varied program with live music, shows, exhibitions and of course numerous impressive motorcycles.

Visit the KessTech and Cult-Werk stand at the Hamburg Harley Days 2023 and experience the unique sound in the world of exclusive motorcycle riding experiences. Find out more about the latest technological developments from KessTech and be inspired by the unique custom parts from Cult-Werk.

External link to KessTech

Photo credit: KessTech, Cult-Werk


KessTech demolition bonus
KessTech scrappage bonus 2022

KessTech scrappage bonus 2022

Now your time has come!
Environmentally friendly! Illegal was yesterday – today you can drive legally!

The regulations are becoming increasingly strict and police checks are becoming more and more frequent. ... just the right time to switch from illegal to legal sound!

Swap your exhaust system now for a legal, type-approved KESSTECH system and save €500.00 or €400.00!

Order your complete system now with the discount code “KT-ABWRACK500” and your mufflers in the shop “KT-ABWRACK400”

Text and product information from KessTech

180K Harleysite
43k followers
21k YouTube
1.4k Twitter
281Followers
6k Tumblr
998Loves
 Subscribers
16.9k TikTok