weird

  1. B

    Weird Idle Behavior

    So I've got a stock 1981 XS400, stock carbs (running cylinder air filters). My bike idles well once its warmed up, but it behaves very strangely sometimes. Once idling well, if I give it gas, the idle jumps up to about 3-4000RPM and stays there, and eventually returns after a few seconds. I...
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