Carburetor bobber wagger

Discussion in '2-Stroke Engines' started by bughuggger, Jul 4, 2009.

  1. bughuggger

    bughuggger New Member

    Grubee starfire has a copper U-shaped element in the carburetor which the bobber pushes up to stop fuel from flowing into the bowl. It was curved, so I straightened it thinking this was why I get so little power on the up-hill. Then the gas started to leak out. Took me the whole day to find out that it was leaking not from the gasket but from the priming button because I had allowed the bobber to rise to high by straightening it out. This rose the fuel well up above the priming button. Well, now I cant get it started, even though I rebent it. Lesson: Dont straighten the bobber wagger.

  2. arceeguy

    arceeguy Active Member

    FYI - You were adjusting the bobber wagger when you should have been tweeking the gizzinter pin.
  3. bughuggger

    bughuggger New Member

    gizzinter pin.

    Please tell me about this gizzard.
  4. arceeguy

    arceeguy Active Member

    The gizzinter pin is the pin that sticks out of the throttle slide (the cylindrical piece that the throttle cable pulls) and "goes into" the fuel metering jet.

    The gizzinter pin (aka jet needle) is held in by a Jesus clip. To adjust fuel mixture, carefully remove the Jesus clip (or you'll find out why it's called a Jesus clip) and raise or lower it on the gizzinter pin. Raising the Jesus clip will lean out the mixture, lowering the Jesus clip will enrich the mixture.

    If your engine runs stronger at part throttle than at wide open throttle, you need to lower the clip. If your engine sound rough under throttle (like a machine gun), it is getting too much fuel. Raise the clip. Your engine should sound like a chain saw when running properly.
  5. E J

    E J New Member

    Is that like the oh God spring! ping "OH GOD WHERE DID IT GO LOL":idea:

  6. bughuggger

    bughuggger New Member

    Thanks, My bike seems to have both problems, but I'll try raising and lowering the pin. By the way, it was just an electrical connection which had shaken loose. Still dissappointed by my hill performance, however. Do other people's bikes go up hills without assistance? How steep?

  7. Jason74

    Jason74 New Member

    My 49cc handles moderate hills pretty well once I am up to speed. I have to help it reach the 15+ mph range and then it carries itself quite well (20+mph). If I was to just peddle to about 5mph and try to let the engine take over it would only chug up the hill in a very slow and choppy way.

    I have no idea whether my bike is running good, bad or normal. With no other bike to compare it to, I have nothing to judge it by.

    Hope that helps,
  8. linnix13

    linnix13 Member

    hills are strange, during break in you wont be able to do hills, on my bike ive noticed 3 power bands, the latter being the most powerfull. i have a 44t sproket and boost bottle, at 15-20kmh is the first power curve and its good for small 5-7 degree hill, then is the second power curve is at about 35kph, and its good for hills up to 10-18 degrees, then there is the extreme power curve which is at 45kph, at that speed though the engine is screaming and vibrating and feels like it will explode at any second! anyways the 45kph power curve will take me up hills anywhere from 20-30 degrees!
  9. bughuggger

    bughuggger New Member

    I looked up "sick bike parts," and found an expansion muffler that doesn't look too bad. Also, the HD axle at 56 tooth looks like it will help me uphill. I don't care how fast I go. I just want not to pedal, but to carry another fifty pounds but myself. I wonder if the expansion muffler is against EPA regs in any way? I certainly wish it was catalytic. This would burn more of the fuel. My whole reason for doing it was for the environment. Four cycles are looking better every day.
  10. arceeguy

    arceeguy Active Member

    Any modification to the exhaust or carburetor is violating the EPA certification. While these little engines spew more pollutants like hydrocarbons into the atmosphere, they emit less "greenhouse" gasses like CO2 (if you buy into the farce that CO2 is a pollutant). The same would be true of a four cycle bicycle engine because these little engine lack the sophisticated (and expensive) engine management systems of modern cars. The thing that attracted me to a motorized bike was the fact that it conserves fuel. It may emit more HC's than a car, but it uses far less fuel and is quite relaxing on short trips into town where a car would be at its worst efficiency.

    There really aren't any killer hills where I ride my MB, so with a 44T rear sprocket (66cc engine) I can max out at 35mph (screaming) but can easily maintain 20 mph up mild grades without pedaling. The little 50cc versions seem to be smoother, although they lack in acceleration when compared to the "big bore" kits.