As of next year, all motorcycles within the EU and UK will be required to meet stricter noise standards due to the implementation of UN-ECE Regulation R41.05. T
These changes are designed to limit the noise produced in various environments, improving both urban and rural noise pollution. While this new regulation does not directly lower the acceptable noise threshold, it instead tightens the conditions under which noise levels are measured. This more rigorous testing process will require motorcycles to demonstrate the noise created while accelerating through cities, towns, and, for the first time, rural regions. The new Additional Sound Emission Provisions (ASEP) framework will also include a greater variety of engine speeds and gear positions.
Earlier regulations permitted motorcycles to be tested at speeds of 31 mph (50 kph) with the engine running and off, allowing manufacturers some flexibility in calibrating engines to meet the standards. Under the new regulations, however, motorcycles will be assessed at speeds ranging from 6 to 62 mph and up to 80% of their maximum engine speed. In addition, motorcycles will be tested across all gears if the transmission permits, which marks a significant departure from previous testing protocols.
This change will lead to four times the number of sound measurements compared to the current standard, capturing a broader range of speeds and engine conditions to ensure compliance with noise regulations.
Another major shift is in the testing oversight. Previously, manufacturers conducted and recorded their own tests, while independent bodies would occasionally verify results through random sampling. Under the new system, independent bodies will directly perform the tests and record results, reducing the likelihood of discrepancies and ensuring greater transparency and accuracy in compliance data.
These updated regulations reflect the EU's commitment to minimising motorcycle noise in urban and rural areas, fostering a quieter environment for residents across Europe.
