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.