SOHC.co.uk Forums > CB750

Low Compression

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Dazza215:
Sorry Hairy Git. lol.
All of the cylinders are between 65 and 85psi. with the choke off and the throttle open.
The bike has run on all four briefly a couple of weeks ago, then only three then maybe one, then two, its all over the place.
Last night i tried starting it and only one cylinder was running, so i thought thats it!!! I cant keep blaming the carbs or the timing so its a complete strip down and rebuild.
I have already bought a gasket set and new valve stem seals, some lapping paste etc.
Plus with the engine out It will allow me to restore the rest of the bike.

Just need to see the size of the pistons to get new rings etc. 
Oh well, just adds some time to the restoration.

Dazza215:
So, decided to strip the engine down. Found a number of issues.
The odd thing is the clocks say its only done 18.5K miles. (yeah right).
Ill put the pics on when i work out how to resize them.

Dazza215:
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Dazza215:
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Dazza215:
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