My mates got a speedfight 100cc. It will ride fine up to 20 mph then it wont go over 20. Its got a new spark plug, new 7gram rollers, open air filter, new gaskets, new piston, new Tecnigas exhaust, several different jet sizes. It ran fine with standard exhaust and an 87 main jet but once the Tecnigas was fitted its never ran properly since. Can anyone help me and him as we are unsure now. Thanks
if its bogging as hes going along like when u put revs on n it trys n dies then most likely a blocked jet but sounds pritty unusual and i would advice going back to the standard exhaust that was on it even though most are like pee shooters lol hope its fixed soon , ive got the same bike
he changed the jet and it worked fine for a bit then he heard a very loud squeak then it cut out. left it 10 mins it started straight up again and rode about 2 mile then it cut out again, god knows whats up
pistons brand new, i think its his head gasket cos hes got 2 old head gaskets and i think they are dead haha
