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Guidelines on anti-tampering rules for motorcycle exhaust silencers
As reported in the last edition of IDN , in a press release dated May 31 , 2023 , the European Association of Motorcycle Manufacturers ( ACEM ) said that it " shares the concerns of citizens , politicians and regulators regarding the impact of noise in daily life " and that " sound emissions of motorcycles have been regulated in the EU , with maximum permitted levels defined since the 1990s , through European type approval requirements ." The release stated that " as part of the solution to address these concerns , ACEM has recently developed a set of guidelines in cooperation with key aftermarket exhaust industry players " and that " the aim of these guidelines is to avoid diverging , non-effective interpretations of anti-tampering rules for exhaust silencers , in particular for non-original equipment that may be alternatively fitted on motorcycles over their lifetime . At the time Antonio Perlot , ACEM Secretary General , was quoted as saying that " this initiative , bringing together the expertise of recognised players in the motorcycle sector , addresses one of the main causes of motorcycle noise in the streets . " Approved silencers with too easily removable baffles or dB-Killers are
Guidelines
These are the key elements and recommendations contained in the IMMA Informal document ( GRBP- 77-20 ) submitted to the UNECE Working Party on Noise and Tyres ( GRBP ). They form the proposed industry guidelines on the anti-tampering today still present on the market , which may result in unacceptably high levels of noise on the road . " Putting forward state of the art solutions , the guidelines will help type approval authorities towards a more harmonised assessment of conformity to anti-tampering rules for exhaust silencers . The call is now on all stakeholders to apply them without delay ." For sound level and anti-tampering rules of motorcycle exhaust silencers , the EU type approval framework Regulation 168 / 2013 mandates the application of United Nations Economic Commission for Europe ( 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 ( Groupe Rapporteur Bruit et Pneumatiques - GRBP ), under the World Forum for the harmonisation of vehicle regulations ( WP . 29 ), operating within the UNECE . In December 2022 , ACEM presented the guidelines to national type approval authorities at a stakeholder meeting organised by the European Commission . Following an informal approval by authorities at EU level , the International Motorcycle
provisions for Non-Original Replacement Exhaust Systems ( NORESS ) - namely , aftermarket exhausts - in UN Regulation No . 92 . The aim of the guidelines is to support " manufacturers , national Type-Approval authorities and enforcement authorities in their understanding of the requirements under section 6.3.1 of UN Regulation No . 92 ."
" Putting forward state of the art solutions , the guidelines will help type approval authorities towards a more harmonised assessment of conformity to anti-tampering rules for exhaust silencers ".
Manufacturers ' Association ( IMMA ) introduced the guidelines in February 2023 at GRBP , the world forum on sound level of vehicles . A final document is expected be adopted at the next GRBP session in September 2023 . This initiative has been jointly developed within the motorcycle
The stated intention is to give guidance on the interpretation of the guidelines with a view to " provide NORESS manufacturers with regulatory certainty , to ensure the implementation of a high level of anti-tampering measures , and to provide national authorities with a set of harmonised best practices for
sector , by ACEM , IMMA , and a selection of motorcycle exhaust manufacturers - Akrapovic , Arrow , Giannelli , Lafranconi , LeoVince , MIVV and SC-Project . The guidelines clarify the technical requirements " to ensure robustness of fixing solutions for silencing baffles and dB-killers , to prevent their easy removal ", and IDN is now able to present a light-touch edit of those guidelines . www . acem . eu