SOHC.co.uk Forums > CB500/550
Crank bearings good or bad
Acro1985:
The crank journals look fine no wear ridges that I can see or feel just a darker line in middle of them all which matches up with the oil channel in the middle of the bearings.
The crank journals measure 33.48mm if I have read the micrometer correctly
McCabe-Thiele (Ted):
Are you talking mains or big ends with your measurement?
I don't have the tables to hand.
Posting your crankcase codes will help.
PS If you can only measure to 0.01 mm you will definitely need to use Plastigauge or have the crank professionally measured.
Acro1985:
The code on the back of the case is BBBBB
The mains measure 33.48
The big end measure 35.48
I think I will look to get it professionally measured just in case I have done it wrong
McCabe-Thiele (Ted):
Honda work in Microns for crank clearances, have you managed to find any colour codes?
Good news is that BBBBB should mean you can find the right shells easily enough provided there is not much mains journals wear.
It's worth hunting down the shell side colour marks - out of ten shell edges you are in with a chance.
Acro1985:
What can I clean the shell edges with, as they are dirty and don't want to damage them or wipe off any slight colour mark
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