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Main Bearing identification

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r1_pete:
Is there a way to measure and identify main bearings once the colour has worn away? I know the outers are B, but I didn't het the crank with the cases.

I have a set of perfect bearings, which I'd like to identify...

AshimotoK0:
I guess Plastigauge on crank. Assemble and check compressed width of Plastigauge after dis-assembly again to determine crank/shell clearance.
Cheers ....  AshD

Bryanj:
If I can find it there was a table of figures once that included shell thicknes, but that only really workred when new and you had to be able to measure accurately to 0.001mm

r1_pete:
Thanks, yes I'd not thought of plastigauge....

Bryan, that's the sort of thing I had in mind...

I have 2 complete bottom ends, cases are As and Bs, and a set of empty cases which I've prepared for use, which are all Bs with perfect bearings, I'm hoping to get a set of bearings without resorting to buying new sets at £9 +VAT a shell.

I've internal and external mics so I guess I could bolt the empty cases together and measure the bearing ids.

archmill:
Definately Plastigauge. Did an article for Practical Sportsbikes magazine last year which explains how it works so from that, you could measure the crank diameter, add the Plastigauge clearance and therefore determine the shell sizes. Its a word document just short of 5Mb so give me your E-mail address and I will send. And anyone else who want it.

Archmill

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