how to adjust

Discussion in 'Motorized Bicycle General Discussion' started by xzackx, Jul 1, 2010.

  1. xzackx

    xzackx New Member

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    i just got my engine running in my bike yesterday (i didnt know how hard the clutch was to pull so i started it with the clutch out) but as i was running it i noticed a black gunk around the bottom of my exhaust pipe its pointed straight down but i dont think thats what causes it and if anyone knows what is about the best air/fuel mixture ? how many turns ? thanks
     
  2. nidyanazo

    nidyanazo New Member

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    There is no mixture adjustment screw.
    You can move the circlip position on the needle to change the mixture though. lower is leaner and up is richer.

    The one screw on the carb is for adjusting the idle rpm.
    It's a 2-stroke motor, the back oily residue is caused from the unburnt oil/fuel mixture.
    That is exacerbated if you mix in too much fuel. Try 24:1 for the first gallon, then got to 36:1-42:1 after it's broken in.
     
  3. FlyingHorse87

    FlyingHorse87 New Member

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    Nidyanazo is right about that. I mixed my fuel 16:1 as per instruction, it drips and smokes like crazy. Don't use that much oil.
     
  4. 2door

    2door Moderator
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  5. xzackx

    xzackx New Member

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    ok thank you guys for helping out and yeah i used the 16:1 i'll have to try the 24:1 next tank of gas
     

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