These days, all racing circuits have noise restrictions. It is extremely important that we operate in compliance with our limits to ensure the future of racing for everyone that abides by the rules.
Anyone wishing to have their bike tested before a test day is more than welcome to come to one of our circuits during our events and have a noise test free of charge.
The initial test is a static test which is carried out using a handheld meter. You MUST have a working rev counter. As per ACU guidelines, each bike is measured 0.5 meters away from the exhaust at a 45-degree angle when the engine is being held at the following RPM:
|Engine Size||1 cylinder||2 cylinder||3 cylinder||4 cylinder|
|250cc (4 stroke)||5,500rpm||8,500rpm|
|300cc (4 stroke)||7,000rpm|
|400cc (4 stroke)||5,000rpm||6,500rpm||7,000rpm||8,000rpm|
|600cc (4 stroke)||5,000rp||5,500rpm||6,500rpm||7,000rpm|
|750cc (4 stroke)||5,000rpm||5,500 rpm||6,500rpm||7,000rpm|
|+750cc (4 stroke)||4,500rpm||5,000rpm||5,000rpm||5,500rpm|
|125cc (2 stroke)||7,000rpm|
|250cc (2 stroke)||7,000rpm|
|500cc (2 stroke)||5,500rpm||7,000rpm||7,000rpm|
In cases where the motorcycle has two separated exhausts, the measurement will be taken as above from the median point between the two.
Factors such as air temperature and humidity can affect the level of noise that your bike is producing. If you are ever within 1dB(A) of a particular limit then we suggest that you strongly consider having your exhaust looked at before making another booking.