MRASA The Motorcycle Riders Association of South Australia
Bike Pipe
Motorcycle Noise Emissions - Abbreviated Article
  Vehicle noise standards define limits on external noise generated by all light and heavy vehicles, motorcycles and mopeds in order to limit the contribution of motor traffic to community noise. The age and engine capacity of your vehicle will determine the allowable noise your vehicle can make. We recommend that you know your rights, and have a basic understanding of the regulations. Below is a table of the last two ADRs that were released.
 
ADR Mandated From Capacity Drive-by
Noise Level
(dBA)
Stationary
Noise Level
(dBA)
Information
Label
39/00 1 July 1988 <80ml
80ml to 175ml
>175ml
77
80
82
94 Yes
83/00 1 January 2005 <80cc
80cc to 175cc
>175cc
75
77
80
+5 dBA
over label signature
Yes
  The most recent ADR (83/00) came into effect on 1 January 2005. If your bike was manufactured after this date, it will need to comply with this standard.
  ADR (83/00) makes reference to two noise levels, one from a moving vehicle (drive-by) and one from a stationary position. This represents the TOTAL noise coming from the vehicle and includes ambient noise sources like the engine, whether it's air-cooled or water-jacketed, intake tract, driveline, tyres, sound absorbing fairings, etc.
  The ADR (83/00) stationary noise level shows '+5 dBA over the label signature'. This means that if your label says 98dBA then you would be given an allowance for vehicle 'wear and tear', resulting in 98+5 = 103dBA before any enforcement notice can be issued.
Compliance Plate or Information Label
  Find your motorbikes information label, which can be located anywhere on a motorbike. It is not a legal requirement to have it on the frame, except for brand new bikes at initial registration. The label will define the allowable noise (in dBA) at a specific engine rpm, and the muffler system fitted to your vehicle (also stamped onto your exhaust).

The rpm on the label is defined as 'half ESMP' - as detailed in the test procedure manual. ESMP is the Engine Speed at Maximum Power, at which the noise emission test should be conducted.
  information label
Example Information Label

Other Standards
  There are other standards and rules that are specific to your State or Territory, which you can refer to for older motorbikes. Generally speaking these define a 100dBA limit, however most States have since deferred to the relevant ADR.

If you would like more information, please refer to the full Noise Emissions article.
Reference Material and Websites
  The MRASA would like to recognise the following sources and contributors of information on the subject of vehicle noise emissions.

Guy Stanford, Australian Motorcycle Council (AMC)
Australian Government website - Vehicle Noise.
Australian Government ADR 83/00.
National Transport Commission - NTC Home Page.
Road Traffic (Light Vehicle Standards) Rules 2013 of South Australia - PDF available here.

 



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