So I'm trying to help my girlfriends moped go faster. It is a 1980 vespa si. I upgraded the cylinder size to a
vespa malossi 43mm 64cc cylinder kit - 12 pin - bravo head. So I put it all together and followed the tuning spread sheet and I can get it to start up, but it is not running at it's full throttle or idling. It see to be flooding and puking gas out of the muffler. I dropped the jet size from a recommended 78 to a 67 and it is still puking gas. Just so you know I am running a dellorto SHA 12.10 carburetor and also performance pipe. Anybody have any idea's