SOHC.co.uk Forums > CB750
Crankcase seal leaking
Rob62:
Nice one blasta... hopefully you have solved your problem without major surgery !!
Moorey:
Good man at least you have tried it. Hopefully all will be good and you can think how much money you have saved yourself.
Nothing ventured.........
Tomb:
Hope it works, good job done if it has.
K2-K6:
Looks alot better than the initial photos so hopefully you'll get a reasonable assessment of it now.
As some of the others have said, it's really not hard to split the bottom with it upside down if you need to go that route so either way you'll get it sorted.
It's quite often looked at as a major task to remove the engine and carry out further work but I've changed gearbox components on these in about 3 hours from stop to running again. I'd rather do one of these than lay under a car to get a gearbox out for a clutch change, which is after all a wearable consumer item.
If you needed eventually to go further, then the output sprocket shaft is the other major one to replace at the same time while it's apart.
Be interesting to see how it gets on now with that new seal in it.
Tomb:
My CB72 engine output shaft seal leaks a little if the bikes been stood for a week, but only when you start it up, not while standing. It has the original 1962 seals in it, I quite like this feature though, it puts a little oil onto the chain until the engine is warm and the seal softens then stops leaking.
Or was that a unique Honda design chain oiling feature? ;D
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