Whats a quick throttle and what does it do?
A quick throttle is very common on motocross machines. A motorcycle throttle has the twist grip which you turn to accelerate. A spring ensures that releasing pressure on the grip returns the throttle to the closed position for safety reasons. What happens when you twist the grip is that the throttle cable – usually braided steel – pulls up the carburettor slide to release more fuel to the engine. In the case of a fuel injection system, it tells the ECU that you want more revs causing it to fire the fuel injectors for a longer duration. How much the slide rises, or how much longer the injectors fire is determined by the amount the cable moves. Which in turn is determined by a cam, a round profiled device which is the inside end of the twistgrip. A quick throttle usually has a larger cam and sometimes, it isn’t round, it is elliptical in shape. What this does is pull the throttle cable more for the same amount of twisting of the grip. The elliptical ones actually pull the cable more in p
