I just bought a suzuki FA50 and put a new cylinder and cylinder head on it and rebuilt it. but the fastest i can go is 25 but i just accelerate faster than i used to! It feels like once i hit 25 there is still a lot more power to go faster but it just wont let me. I am thinking that there may be a restrictor in the exhaust or something because one time i blew the exhaust gasket and started going a steady thirty. I am also thinking about getting a performance exhaust from treats. But im not sure what I should do to get my moped going faster! is there a governess or something?