Well basiclay i have a speedfight 2 ac 50cc. Its got a few mods such as exhaust with restictor(sp?) taken out and carbon reeds and 50cc sport cyclinder. Anyway the bike runs fine nice browny coloured spark plug, revs constant all the way to top speed, but when i do hit top speed the bike splutters then fine then splutters, it feels like the bike can give more but its not letting it. Also when going down a hill the bike will rev then like hit a wall and stop reving, and when i let go of the throotle and pull it back the bike cuts out the starts agien. Someone told me it could be my cdi, but i dont want to buy something witch wont fix my problem or fuck it up. Many thanks
i think it is to much air geting in the engine or the wire ove the top on ur carb new onw ove them or cdi maybe clane ur airbox fist and then try mate
