| The engine management system uses a throttle position sensor to monitor throttle input so the computer can supply additional fuel to the engine when you turn the throttle grip. This sensor's resistance changes as you vary throttle opening from full-closed to full-open much like the volume control knob works on a radio.
And just like a radio with an intermittent scratchy volume control, the throttle can occasionally send a full-closed (no gas) signal even though you have opened the throttle. This gives you a dead spot or drop-out in the throttle. Contact cleaner works fine for volume controls, but the throttle position sensor (TPS) is sealed to prevent water from getting-in, so a faulty unit should be replaced.
Keep in mind that an open TPS circuit gives a fail-safe closed throttle signal. So before replacing the TPS, first clean and tighten the connectors between the TPS and the computer. An intermittent open (non-conducting) electrical connector will also be the cause of an occasional dead throttle condition.  |