SOHC.co.uk Forums > CB350/400

CB400/4 crankshaft bearings - refit or replace?

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Drew400:
Hi all, my latest seeking of advice...

I have split the crankcase only for cleaning, it was running fine until then. All the innards are in tact and will be replaced (i.e. not taken sprockets off shafts, etc.). The crankshaft bearing shells all look fine to me and have been carefully labelled for refitting. Some people have said they will be fine to go back and others (like my Haynes manual) suggest they should be replaced. Maybe this is dependent upon the bike's post-rebuild life plan... it will be retired into occasional good weather use only; the bugger's had a hard life to date, or so it would seem, and now deserves a warm pasture!

Any conclusive thoughts from experts out there?

Thank you as usual.

D.

mickwinf:
I am in the same position with my 500/4, and they are going back in, as long as they are not scratched or showing copper through the tin surface I think they are good to go.

Trigger:
Change the sells. especially on anything high mileage and as Oddjob says, Chains, tensioner, damper rubbers ect ,ec. Also check all the rolling bearings and check out the oil pump. If you are in, you may as well. Rolling bearing can be matched and not expensive. 

Trigger:
Yep, Your right Oddjob. I never give a price of a re-build until i have stripped it and had all the requirements from the customer.
Where's the pictures then??? 

Drew400:
Thanks all so far.

I'll sort some pictures ASAP (will be a few days). In the meantime, you have given me plenty of quality food for thought already!

Cheers, D.

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