Can a vacuum leak cause a motorcycle to stall?
Can a vacuum leak cause a motorcycle to stall? If you run into a situation like this, I would recommend replacing the felt with an O-ring. Fuel pump diaphragm and/or tubing leading to intake can also be a source for a leak. The fuel pump diaphragm can also leak fuel through vacuum tubing causing the motor to stall on deceleration. What happens when the throttle position sensor fails? The throttle position sensor can fail in several ways, all of which result in poor fuel economy at best, and performance limitations that may create safety hazard for you and other motorists...