SOHC.co.uk Forums > CB750

do I need to replace my main bearings

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Bryanj:
Difficult to be certain in pics, i would plastigauge those and if within tolerance reuse them

Sesman:
Plasitguage is in post no8

K2-K6:
I agree that, if the tolerance checks come good, then they appear in very good shape to continue.

As noted already, the oil conditions so far seem to be impeccable as they look to all purposes "just run in" literally with typical witness marking as expected. 

New won't give any tangible benefit given the above.

Sp1john:

--- Quote from: Sesman on November 04, 2022, 03:26:54 PM ---I’d say if it’s the first tear down and the crank is in good shape it all depends on your mission and riding intentions. If your are doing a full restoration I’d replace them.If you are happy with the engine and don’t intend to rack up the miles and are operating a strict budget, you might want to use the cash saved elsewhere. I can’t help myself and replaced all shells, main load bearings, dampers and chains….it’s just the way I’m made.

--- End quote ---
thanks for the advice... the bike will only be doing low mileage  so I will put them back in 👍

Laverdaroo:
Bazinga!

£180 saved to go to the tyre budget............woohoo ;D

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