350cc Heavy Weight Main Bearing Fit C3?

LynP · Post by **LynP** » Thu Jun 23, 2011 1:14 pm

Hi, I am looking for advice on the bearings on the drive side of a 1960 G3LS. I am replacing these bearings and my factory manual states in highlighted text that the outside (Chaincase side), RLS8 bearing should be a C3 fit. The inner RMS8 does not have a fit mentioned so I assume it is a standard clearance bearing. The bearing supplier I use said it was unusual to have two different fits next to each other. Can anyone tell me which is correct for these bearings? What have other members fitted and are any mods. ie an outer sheilded bearing advisable.
Thanks for any help, LynP

itma · Post by **itma** » Thu Jun 23, 2011 2:16 pm

Use C3 fit on any bearing inside an engine; you may have to hunt around to find them, try and stay awy from far eastern made bearings.

C3 is not the really fitting clearance but the
running clearance

LynP · Post by **LynP** » Thu Jun 23, 2011 8:04 pm

Thanks itma for your help. Does this mean both bearings not just the outer should be C3?

itma · Post by **itma** » Thu Jun 23, 2011 10:26 pm

yes both bearings should be C3