I put a racing crank in a Zip 2T and on restart it revs up to screaming high. Throttle is in normal position. Any ideas please. I may have a vacuum leak but how can that cigg paper thin crack make it rev to the moon.
Probably. I cleaned up the carb insides reading the pilot jet could be an issue. Started up and no more high revs. Just cannot get the oil from the pump to carb now. I have bled oil to the pump and held the cam full open. Previously it pumped up but not now. Going to get a syringe
