Race Demon 750 DP idle issues

Discussion in 'Engine Topic' started by C4Racer, Sep 7, 2019.

  1. C4Racer

    C4Racer Veteran Member

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    Ya I think the problem was the return spring. It was a single and very weak. I replaced with a stiffer dual and I think that going to do the trick. I’ll drive it tomorrow but from initial testing seems good now.
     
  2. C4Racer

    C4Racer Veteran Member

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    Confirmed - return spring. Drove it for about an hour today and no longer holds up RPM. It's interesting - this carb does take 10-20 seconds or so to return to a full stable idle - but it's repeatable - does that every time, so it's normal operation.
    Of course now the return spring is kinda heavy making the throttle heavier to operate! Ha. I may need to dial it back one step in-between where I was and where it is now.
     

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