Question about 1981 Yamaha XJ 650
81 yamaha 650 xs special
When was the last time you had the carbs synchronized? If they are not flowing the same it could couse this problem.
Posted on Jul 02, 2009
You should check the valve clearances, camshafts timing and make a compression test on the engine too.
One or more of your inlet valves is/are either not closing entirely or they close but their stem is damage and it doesn't seal off the combustion chamber properly.
Posted on Jun 28, 2009
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Posted on Jan 02, 2017
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