


The Label Match-Up Program
Two key elements of the label match-up are contained in the federal regulations. They are noise emissions testing, and labeling. This applies to street9-1 (highway use), and off road9-2 (dirt bikes) motorcycles manufactured after December 31, 1982, which are for sale in the U.S.
The EPA chose not to enforce noise emissions standards (noise level testing) on motorcycles that are for competition use9-3 or export, and motorcycle exhaust systems that are for export, pre regulation motorcycles, and competition use. However they do require labeling for these exhaust systems9-4 and motorcycles9-5 as a means to identify and set what (export) and where (competition events) these exhaust systems are to be solely used for, and the type of motorcycle (pre regulation, or competition models) installed on.
Noise Emissions Testing
The EPA sets the maximum noise emissions levels9-6 by measurement under a strict scientifically derived testing procedure (SAE j331a)9-7 to recreate the vehicles' maximum noise levels while under heavy acceleration. This test represents what can be expected in actual real world use. Currently the maximum noise emissions are 80dba for street motorcycles. This current noise emissions limit (or cap) offers the minimum level of protection to the public.
Labeling
Once the motorcycle successfully passes the noise emissions test (J331a), two labels (one on the vehicle chassis, the other on the vehicle muffler) are required to be affixed in a "readily visible position" at the factory. Both these labels contain an identical model specific code 9-8 (along with other information) that is unique to the make and model of the motorcycle. The comparison of the model specific code between the two labels provide a way to "match up" the muffler to the motorcycle.
A regulated motorcycle that has an exhaust system installed without the correct label (i.e. competition use, pre regulation, export only, or no label at all) or has an exhaust system from a different make and model of motorcycle (un-matching model specific codes), is in violation of federal regulations and section 4909a(2) of the Noise Control Act (NCA).
The label match-up, quite simply, eliminates all ambiguity as to what is or isn't a suitable motorcycle muffler. It greatly lightens the burden on police, who normally would have to place a subjective value like "excessive" or "unusual" on motorcycle exhaust noise, by instead just requiring a simple visual check for the correct muffler label and model specific code. Enforcement is this easy. No sound level meters or special skills are required...............................
Read more here
Add to Technorati Favorites
: