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Thread: Fuel pouring out of airbox + running lean

  1. #31
    Senior Member Tuber's Avatar
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    mine was sold out of NH and has a 128 main (2005)
    2005 Tdub

  2. #32
    Senior Member Fred's Avatar
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    My 2003 California model came w/ 128 main and I believe other 49-state bikes that year had 130 main.
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  3. #33
    Senior Member sponge's Avatar
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    Quote Originally Posted by travelrider73 View Post
    So, one more question. My motorcycle was behaving as if it was running very lean. This problem we discussed was, in a way, too much fuel, which would make me think RICH, not LEAN. Unless the fact that the fuel was all pouring into the air box was starving the engine of fuel...

    Since I've been messing with the carb, I wonder if I should reset the jets to "factory spec" and go from there. The problem is, the supplementary service manual doesn't tell me what that spec is. It actually says Before disassembling the carburetor, make
    sure to note the number of times the pilot screw is turned out from the seated position to its set position.
    . That's not very helpful if you're trying to figure out the right starting point not knowing anything. Can anyone tell me what that factory spec is on a 2007 TW200?

    Thanks!
    Didn't see an answer to this question so I'll give you my .02
    Part of the job of the carbs jet assembly, is to break up the fuel into small droplets that can then be atomized in the air stream. If you remove the jet and then the needle jet tube you will see tiny holes down the sides to help this process. When working properly the tint droplets sort of fountain up into the air stream.

    On the other hand when you flood the carb the fuel is running up the tube and puddling on the bottom if the intake track. It may run back and flood your air box, or forward and flood the cylinder. What it isn't doing is spraying up into tiny droplets where it can quickly evaporate into a good mixture.
    Chris Vogel
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  5. #34
    Senior Member Fred's Avatar
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    Could this be how gas is getting into the air box yet bike seems lean?
    https://m.youtube.com/watch?v=EIokesQuN1o
    But seriously ​the factory pilot screw mixture setting should have been around 1.75 revolutions for the 2007.
    Tweaker likes this.
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