The text prepared by the expert from the International Motorcycle Manufacturers Association (IMMA) to amend UN Regulation No. 41-04 (up to Supplement 7), in order to clarify the implications of footnote one on the requirements specified in Annex 4.

Proposal for amendment by IMMA to address the issue of stationary noise measurements on a single sided dual exhaust system.

The text was prepared by the expert from the International Motorcycle Manufacturers Association (IMMA) to amend the ASEP requirements

The text was prepared by the expert from the International Motorcycle Manufacturers Association (IMMA) to amend Supplement 6 to 04 series of amendments, aiming to minimize proliferation of approval numbers

Presentation by the expert of IMMA supporting the proposed amendment to ASEP (GRBP-71-17)

Text by IWG ASEP for revision of ASEP as a future concept of real driving

Text submitted by chair of IWG ASEP for the status report

Proposal to introduce provisions for stationary noise measurements on a single-sided dual exhaust system, minimize proliferation of approval numbers from models with differences in vehicle exhaust and silencing systems, and correct an omission regarding the compensating resevoir fill time thereby aligning UN R41 with the other noise UN Regulations Nos. 9, 51 and 63.

Article commenting on the German Federal Council decision regarding reduction of motorcycle noise.

Motorrad online article concerning Austrian measures to ban loud motorcycles from certain roads.

The scheduled 1-2 July session has been postponed. A new date will be announced when available.

Per the transitional provisions of Supplement 3 to the 04 series of amendments, from 20 January 2021, the specifications for the test site reproduced in Annex 4 will be replaced by the provisions of ISO 10844:2014. Therefore, this proposal aims to align the 04 series of amendments with ISO 10844:2014, replacing provisions from ISO 10844:1998 (and proposing a clearer image for Figure 1).

Proposals prepared by the ASEP II informal working group to clarify UN R41 and introduce provisions to improve testing to be more representative of real-world operation by expanding the scope of tests.

Updated version of document GRBP-71-13-Rev.2 submitted for the September 2020 GRBP session.

Proposal to clarify UN R41 and introduce provisions to improve testing to be more representative of real-world operation by expanding the scope of test and to align the Regulation with ISO 10844:2014, replacing provisions from ISO 10844:1998 (and proposing a clearer image for Figure 1).

Proposal to align the 04 series of amendments with ISO 10844:2014, replacing provisions from ISO 10844:1998 (and proposing a clearer image for Figure 1).