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vacuum leak

  1. C

    Hanging throttle/high idle

    Edit: originally posted this in SOHC carb thread by mistake - not sure how to remove that post. Hello all! I have been racking my brains on a recently purchased 1981 CB750K, with the VB42 carburetor set up; original air box and original breather tubes. The bike was sold to me in 'as is'...
  2. D

    Idle hangs up

    I have a 1980 cb750c. I got it from a guy for 575 dollars and he told me the carbs needed cleaned. Cleaned the carbs and found a vacuum leak. Got new boots and now there is no vacuum leak. The problem now is that it doesn't idle very well and if you rev it it will hang up at about 5 rpms and...
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