SOHC.co.uk Forums > CB750

Engine full of fuel and seized up

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K2-K6:
It does sound like the crank is bent doesn't,  from the rotation description  :o

I'd not have guessed at that from the beginning.  On the positive side,  it shows how strong the rods and starter motor are  :D

allankelly1:
Yes if the crank is binding in it’s main bearing journals then it’s most likely bent but since the force was transmitted thru the rods surly you should call them suspect too?

Good luck

Best wishes Al


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royhall:
Not necessarily. The drag of bone dry shells could have moved them in the casings.

Trigger:
Take the fly wheel off. Grease the shells , place the crank back in and bolt the cases together , then turn the crank by hand  ;)

PJM47:
Yes flywheel next. Doesn’t that need a special tool though? Any recommendations?

The wear on the shells is fairly even.

The flywheel gear is so close I can’t get my smallest feeler in between it and the case, that doesn’t sound right, and there are marks on the case where it looks to have rubbed.

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