74 cb750 dumping oil from breather tube

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74 cb750 dumping oil from breather tube

deek
at idle engine is dumping oil onto driveway from breather tube anyone had this problem?
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Re: 74 cb750 dumping oil from breather tube

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Is the engine too full of oil? Have you drained the breather catch tube? I hope you do not need a rebuild, but you should run a compression check. You might have bad rings.
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1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
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Re: 74 cb750 dumping oil from breather tube

Re-run
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I have heard of people with modded engines producing too much pressure and pushing out oil. I can't remember the fix but I doubt that is the issue here.

I would start with the catch tube. Might be bad form but I leave the plug out on mine.
The ride IS the adventure. The destination is just to get gas!
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Re: 74 cb750 dumping oil from breather tube

seestheday
Mine hasn't had a plug in since I've owned it.
1981 CB750K with 900 cams
90K KM's, rebuilt head, rebuilt carbs, upgraded valve stem seals

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