Speedfight 4 ac carb settings

Discussion in 'Scooter Tuning' started by Normnormal, Aug 1, 2021.

  1. Normnormal

    Normnormal New Member

    So.. my daughter killed her scoot, conrod bearing gone and piston damage!
    I’ve rebuild the bottom end with new crank, bearings and put a new top end on, now for the troubles..
    When I opened the carb, the needle fell out and the clip vanished (not even sure how that happens). Does anyone know what the standard needle clip position is? If I put it on highest (needle will be lower) it won’t even start. In the middle it starts but gets very hot to the point of soft seize!
    So should it be at the bottom (needle raised to highest point). Also what is the standard air/fuel mix, I believe it’s usually appx 2 turns out? Can’t seen you find any information on what the standard carb settings should be? If anyone knows it will save me a hell of a lot of time as you have to take seat off each time to make a change :(

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