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hello, I will be really appreciative if you would answer my question. So recently i bought a 100cc bbk from ebay which comes with roller weights, main jet and the kit( cylinder and head), I tried to installed them but it did not work. Well, I paid 300 dollar , a professional technician fixed it and it runs fine. THE PROBLEM IS the scooter still runs 35mph....... I must have left something out. I left the exhaust, CDI, fuel lines, roller arms and spark plug stock. I really don't know where to start and i ran out of money too ....