If you buy a cag of e-bay you can get a bag full of problems. My sugestion is to buy one from a pocket bike racer that is already sorted. The amount of people that i know that have bought one cheap had nothing but trouble trying to sort it out. The bike ends up in the corner collecting dust as they are fed up with all the dramars. Buy one from one of the racers that has it sorted and you will enjoy it. To modify one to a happy point where you can enjoy it with reliabillty will cost you after purchase app an extra $350. So hopefully you can see where i am coming from.Modified motor with porting$150 = exhaust $99 = carby $120 So do the sums. Bill ps I hop

e this helps