Holly shit who told you to use jets that big?! Im always amazed how people are running close to 100s on their peds, my guess is that THOSE people have air leaks and are compensating for them with a larger jet. Example: 65cc airsal + biturbo on a Tomos should run 58-60 jet. 70cc pollini + pollini pipe on Vespa should run about 58-60 jet. How the hell do you jump from 60 to 80+ with just 10cc is anyones guess but this is what my ped sounded like when the jet was waaaay too big. We downjetted and its great. Id say drop to 65 and try it.