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Old 04-01-2024, 11:56 AM   #3
Thumper   Thumper is offline
 
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Join Date: Feb 2021
Location: Kansas City
Posts: 2,283
Definitely get the valve adjustment dispensed with. It's easy and you can rule that out. Jerry is spot on there.

In addition, you might try some rejetting once the valves are adjusted. First ride it for a few days and see how that affected the engine. Then just try a minor jetting or needle height, or airscrew change and see if it improves or gets worse. If it is basically running OK, these fine tuning issues on the carb can be hard to pinpoint.

If these things don't help, do some testing. A replacement CDI is cheap, and you could simply try a new one. Also, maybe connect a timing light to it and shoot the F line in the timing window. See if you get consistent firing and see if it's lining up cold/hot.
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