Help with air intake!!!

Discussion in 'Motorized Bicycle General Discussion' started by Absocold, Aug 6, 2008.

  1. Absocold

    Absocold New Member

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    I recently put a new carburetor on my china girl. She's now actually running! But the problem is that I don't think I'm getting as much power out of her has I should. On my last carburetor the engine was most powerful when the air intake lever marked with Chinese symbols was all the way to the top. Now, with the new carburetor, if I put the lever all the way up the engine dies. I can have it at about the halfway point and it will run, I just want more power. Anybody got any ideas?
     
  2. jasonh

    jasonh New Member

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    All the way up is Choke fully on. All the way down is fully off. Once the bike's warmed up you should have the choke fully off for best power.

    I will crank the bike over once with choke all the way on, then it will start when I crank with 1/3rd on. Once it runs for a min, I turn the choke all the way off.
     
  3. Pablo

    Pablo Master Bike Builder & Forum Sponsor

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    What happens when it's warmed up and the lever is all the way down? :D
     
  4. Absocold

    Absocold New Member

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    Gotcha, thanks for the help! So I have developed one other problem. The reason I had to replace the carb was that I was going down a hill, was going about 45 mph, and overreved the engine. Dumb, I know. It wouldn't even run before I put in the new carb, but now, when I reach about 25 mph I can here something dinging around in my engine. When it does the engine starts loosing power and I have to slow down. Any ideas as to where it might be and how to get it out?
     
  5. jasonh

    jasonh New Member

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    Hmm, if something was actually in the motor, you'd probably hear it all the time, not just when you're going fast.

    I think I remember reading something about this...Pablo, help me out, was it the wrist pin bushing?
     

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