This gage indicates the engine speed in revolutions per minute (rpm).

Notice: If you operate the engine with the tachometer in the shaded warning area, your vehicle could be damaged, and the damages would not be covered by your warranty. Do not operate the engine with the tachometer in the shaded warning area.

This feature prevents the engine from operating at too many revolutions per minute (rpm). When the engine's rpm are too high, the throttle is closed to reduce speed, if this is not sufficient, then the fuel supply to the engine will be limited. When the rpms return to normal, the fuel supply will return to normal. This helps prevent damage to the engine.