hi, looking 4 help on a speedfight 100, accelerates smooth up to 40 then from 40 to 52ish it accelerates more quickly but there it tops out unless there is a downhill bit involved. The only mod it has is a Leo Vince Touring exhaust. I bought with this exhaust on so I have never ridden it any different. should it accelerate like this or is it faulty, can anyone help - thanks - Rod

Rod, May 2007

hi, thanks Dave,I have ordered a main jet (100) from PM, airbox to be modded and plug from 8 to 9, hoping this will help.

Rod, May 2007

i have speedfight2 ;it sounds faulty!!should be smooth all through exell ;top speed 60-65

dave, May 2007