I have a motorcycle in France that is insured. For clarification, I do ride on road and not on a circuit.
Doing some maintenance, I changed the air filter to a racing one that says to increase air flow (and therefore performances). In the description of the filter is written "Competition use on closed circuit only." and the filter has a different color to clearly indicate it's a racing one. For precision, there is a similar air filter said to be for "performance" that does not contain the "Competition use on closed circuit only." line in the description nor the special color and with smaller indicated air flow.
In case of an accident (responsible or not), can my "all-risks" insurance not apply because of this ?