Guys, I have a PW50 which has got a bit of a problem. The bike idles fine in START mode, but when switched to run - begins to pic up revs - and gets faster and faster, seems as the rear wheel spins the revs pic up as well. It responds well to throttle in-put but doesn't revert to idle speed when the throttle is closed. Any ideas why this is? Cheers - Boner.