SOHC.co.uk Forums > CB500/550
Oil leak from points cover.CB550.
SteveW:
Is it possible to split the cases without removing the head and barrels?
Bryanj:
Yes, but you have to remove the camshaft to get enough play in the chain to lift crank
SteveW:
--- Quote from: Bryanj on February 16, 2025, 07:41:58 PM ---Yes, but you have to remove the camshaft to get enough play in the chain to lift crank
--- End quote ---
Thanks for the info, I might attempt my output shaft seal on my 650 then later in the year.
deltarider:
--- Quote from: SteveW on February 16, 2025, 12:52:27 PM ---You could try Wynns Stop Leak, it’s supposed to revitalise seals. Worth a try for about a tenner.
It slowed my output shaft leak on my 650.
--- End quote ---
I'd do this first ^. I have good results by using an oil that is known to keep rubber parts supple. It's THE major concern as far as our 50 year old engines. You could also put bike on the main stand crank a few turns and... wait. It's more or less the same advise I give when owners 'all of a sudden' have a fuelleak after a prolonged period of inactivty in combination with drained carbs. Open the petcock and after waiting some time, often the seals will swell again.
K2-K6:
--- Quote from: Oddjob on February 16, 2025, 03:52:54 PM ---Remove the points plate and you can see the crank seal, as TSD has said it's normally a split the cases job to replace, that's because it's lipped on it's outer edge. First off you need to make sure it's that that is leaking, it could be the crankcase sealing itself. You could possibly get away with removing the seal, if it is that, and removing the lip off a new seal and driving it into place, it may work and for the cost of a new seal it may be worth trying first. However that's not without it's risks, the seal is very close to the crank shells and if you hit those you're in a lot of trouble. It has been done though.
--- End quote ---
Thought we had a thread on this in the anals of forum. Recall as a successful replacement in situ, but could be wrong :)
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