peugeot speedfight wont run properly?

the advice i would give is that thew problem is probably due to the exhaust you have on it ,is it a performance race expansion chamber ?if so then your rollers are not light enough just to make the point try taking 3 of the 6 rollers out of the variator and see what its like then, leave three in there in a triangular formation so the variator opens and closing evenly.

adam bike doctor(of milton keynes motorcycle centre)
February 2011