Bikers' Days Noise standards

The fight against noise is now omnipresent on European circuits where controls are carried out.

For each ride, a precise limit is set, which cannot be exceeded :

Spa-Francorchamps : 100 dB
- Static control: the microphone is placed at a distance of one meter from the muffler at an angle of 45°, with the engine running at 8000 rpm, regardless of the displacement and the number of cylinders
- Dynamic control
Mettet
- Static control : 94 dB - for the two fastest groups before going on the track
- Dynamic control : 101 dB
Misano : 103 dB
- Dynamic control
- Original muffler or exhaust with mandatory dB killer
Mugello : 105 dB
- Dynamic control
Imola : 100 dB
- Dynamic control
Le Mans : 102 dB
- Dynamic control
Assen : 100 dB
- Dynamic control

During the day, each participant who exceeds the standard will receive a black flag warning. If we notice a second violation, there will be final exclusion from the day.

WE DRAW YOUR ATTENTION TO THE FOLLOWING POINTS:

The dB Killer cannot be handcrafted, it must be marketed and approved.
The cartridges of racing mufflers must be changed regularly because, over time, they lose their effectiveness.
Some machines, even if they are equipped with original mufflers, exceed the standards. Example: the Ducati Desmosedici..
In case of doubt, choose a serious and effective solution which will avoid problems on the spot which are always difficult to solve.

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