To avoid noise pollution, it is advisable that motorcycle riders...
A)ensure that the exhaust pipe and silencer are always in good condition.Correct
B)ride with free exhaust.
C)only take care of the silencer; the exhaust pipe does not influence noise.
Vehicles may not circulate emitting electromagnetic disturbances, noise, gases or other pollutants above the established limits.
The circulation of motor vehicles and mopeds with so-called free exhaust, that is, without the explosion silencer device, is prohibited.
In general, if we emit noise, smoke or gases at values higher than those permitted, the agents, in addition to the corresponding sanction, may immobilise our vehicle.