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help tuning Yamaha RD 400

September 26 2006 at 11:46 AM
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paul  (Login vwbuge)
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My Yamaha sat for a year or two. Took the carbs apart and cleaned them. The bike rums ok now and does not miss like it did. However, it still is not right. It seems to break up at mid to high RPM just where the real power should come on. I had someone check the spark while running and it is OK. I am convinced the problem is in the carbs. I have aftermarket exp chambers and a Uni-filter instead of the stock airbox.

Once I rebuild the carbs where should everything be as far as adjustments and jetting? I am new at rebuilding carbs and don't know where to start.

Any other suggestions?


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