No throttle response at Low End

Discussion in 'Motorized Bicycle Trouble Shooting' started by alumaline, Oct 3, 2014.

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  1. alumaline

    alumaline New Member

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    My China girl engine has terrible low end throttle response. The RT carb is way better than the stock carb but low end is so bad if I don't constantly rev the motor it dies. Sometimes when the motor is hot it will run at high rpm without me reving motor. A cold motor with full choke has a reliable idle.

    I tried Al Fishermans engine trouble shooting ideas, which helped a little but no fix.

    Thanks in advance.

    Mark S.
     
  2. Slogger

    Slogger Member

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    "Sometimes when the motor is hot it will run at high rpm without me reving motor." = revving with the throttle closed- This makes me think air leak.
    I would check the manifold to carb junction and the manifold to cylinder connection, too. Also check the carb slide is moving smoothly as the throttle is twisted.
    Just a first impression.
    Good luck!
     
  3. crassius

    crassius Well-Known Member

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    yeah, sounds like air leak
     

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