SOHC.co.uk Forums > CB750

Stoppinbg a bottom case oil leak.

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Trigger:
The early ones had a o ring but, I have never come across a later type with a o ring. Never know one to leak and most of the later ones were just cast in to the bottom crank case.
You should never use any plastic weld or anything else inside the engine. Is the leak on the seam of the cast ? A close up would help on pin pointing a leak.

kthree:
The leak appears to be on the seam somewhere.

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