Brussels (Belgium), 18 March 2025 - The European Association of Motorcycle Manufacturers (ACEM) welcomes positively the adoption of the 03 series of amendments to UN Regulation No. 92, introducing new anti-tampering provisions for the non-original replacement exhaust silencing systems for motorcycles.
ACEM acknowledges the concerns of citizens, policymakers and regulators regarding the impact of noise on daily life. Motorcycle sound emissions have been regulated in the EU for decades, with maximum permitted levels defined through European type-approval requirements since the 1990s.
Here the UNECE (United Nations Economic Commission for Europe) web link to download the guideline document (Industry guideline on the anti-tampering provisions for non-original replacement exhaust systems in UN Regulation No. 92): https://unece.org/sites/default/files/2023-01/GRBP-77-20e.pdf
In 2023, ACEM, in collaboration with the aftermarket exhaust industry players and the International Motorcycle Manufacturers’ Association (IMMA), published a set of guidelines supported by several European stakeholders to address these concerns. These guidelines have further contributed to the discussions leading to the newly adopted anti-tampering provisions by the UN Contracting Parties.
Antonio Perlot, ACEM Secretary General, said: “The adoption of the new anti-tampering provisions marks an important step in ensuring that motorcycle non-original replacement exhaust systems meet the current regulatory standards. This positive step ahead will reinforce measures against excessive noise addressing concerns raised by citizens and policymakers. ACEM remains committed to supporting harmonised implementation, working alongside authorities and industry stakeholders to ensure compliance and preserve responsible motorcycling.”
Note. For sound level and anti-tampering rules of motorcycle exhaust silencers, the EU type approval framework Regulation (EU) 168/2013 mandates the application of UNECE Regulations no. 92 (aftermarket silencers) and no. 41 (original motorcycle). These Regulations were developed and are maintained by the Working Party Noise and Tyres (GRBP), under the World Forum for the harmonization of vehicle regulations (WP.29), operating within the United Nations Economic Commission for Europe (UNECE).
https://unece.org/transport/vehicle-regulations
In September 2024, UNECE GRBP adopted the new requirements during its 80th session and followed by the final adoption at the March 2025 sessions of WP.29 as 03 series of amendments to UN Regulation No. 92.
https://unece.org/transport/documents/2024/12/working-documents/grbp-proposal-03-series-amendments-un-regulation-no
(ACEM press release; https://www.acem.eu/).
