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.


  • 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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Fermer Zoomer