Hpi baja problems

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Luisd

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Hi I bought a second hand baja a few weeks ago and I have a problem with the top end it runs slow... When I accelerate it makes this high pitched bah bah bah bah sound and when I try to tune it it doesn't do any thing, but when I tune it with the wheels of off the ground I can notice I difference from a rich tune to a lean tune. I also noticed air bubbles in the fuel line I don't know if that has anything to do with it... In summary when the car is under load (on the ground) it makes a high pitch sound and when it isn't under load (rear wheels of the ground) it sounds good. :mad: Could it have something to do with the Clutch or the carb?
I've noticed that it runs a bit better when the engine is cooler eg at the start of a run.
Cheers
Help much appreciated :)
 
First thing you need to do is fix the air in the fuel line. I would run new fuel lines. After you do this I would take some carb cleaner and while it is running spray where carb meets cylinder if there is any change in sound then you have a air leak. Good luck
 
Oh thanks I'll try that. Have you had this problem as well, is it a comman problem?
Cheers
 
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