Carefully reconnect the negative battery cable after all other parts have been properly placed and reattached. To check whether the idle air control valve is functioning properly, start the engine ...

Directional-control valves are vital in any pneumatic circuit ... and connect various system parts. Three-way, two-position valves consist of three ports connected through passages within a ...

With high-pressure air moving the valves up and down and way less moving parts, the engine rpm can go to more than 20,000, even though Guidotti says Avintia bikes only work in the 15k range.