The combustion sensor is the most critical instrument that is used by experienced tuners. This way, they are able to detect the engine combustion and prevent hazards that can be created by improper fuel delivery, high cranking compression, etc. The illustrated device was spotted on the race prepared Sea Doo of Frenchman Cyrille Lemoine. One of his mechanics informed us that it has prevented engine detonation several times. Lemoine is one of the few riders that got factory support last year from Bombardier.