Where can I find information about noise levels for motorcycle exhausts?
• There are specific requirements laid down in the EC Directive covering motorcycle noise. The test itself is a dynamic test known as drive by. The test is conducted on a special approved surface as described in the directive, due to the cost of this there are very few in the UK. The approach speed is 50km/h in specified gears followed by full throttle application. The acceptable noise level depends on engine size but generally lies between 75 and 80 dB.
