i have an 07 people s 50 4t and i know ofr one the variator is restricted.theres a lip on the variator boss,this must be machined off to derestrict.if your like me you read the manual,it says to use high test gasoline.but,if your forced to use oxygenated gas.use the lower grade.oxygenated ags is considered to be any gasoline with additive(methanol,ethylene...)most modern fuels.after some searching i found a gas station that sells 100% gasoline,no additives.ive found that if your scoot isnt running right,try another gas station.i hope this helps,but if you want to talk more email me and we´ll figure it out together