peugout speedfight 2 air box issue help please?
hi i have come acrosas a small snag with me 50cc speedfight 2, it runs fine without the air box sealed, but as soon as you seal it all up, it doesnt want to run to well at high revs, but fine on idle. But without the air box sealed it revs its nuts of absolutly fine. I have tried another carb, and hav eliminated that it is not a carb issue, it is somewhere in the air system wondering if anyone could help? and also advise me on what the vacum pipes do under neath.
thanks
jamesybug
August 2009