well changed my bigone exhaust for a giannelli i have a a 76 jet in it was gettin like 60 65 with bigone now with giannelli onley 50 and it seems to be sprayin petrol out ov exhaust but the plug is not fowling doin my head in dose any one have a idear what size jet i shud be useing mi bike is a malaguti phantom f12 50 (ac) minarelli enigne i have 6.5 gram rollers and a stanard airbox with malossi fillter
fuck all to do with the jet, rollers will need ajusting.... if the revs have dropped off since the pipes been fitted drop the weight of the rollers, if the revs are good/high add a lil weight to the rollers. diff pipes need diff weight rollers.. all this in guides section
i would suggest beofre even thinking of trying to do engine work, you work on your spelling first i struggled to make anything you said