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Neil Harvey Neil Harvey is offline
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Join Date: May 2004
Posts: 259
Originally Posted by bdonally View Post
The crank looks great and measures at the center of the book tolerances.
The rod and main bearings are in nice condition.
Bearing clearances measured by micrometer and by plastigauge are as follows:
Mains: 0.05/0.06mm
Rods: 0.05mm
Standard practice would be to replace the bearings, but I hear quite a few issues with aftermarket bearings and I wonder about the chances of winding up with worse clearances.
Here are a couple of photos of the bearings.
Can anyone identify the symbol?

No sir , those main shells are no good. As long as the photo is not deceptive, the bearing has a lot of embedded junk. In one of the photos it shows a wear pattern. This should be mirrored on the other side of the shell if the main housing was straight.
Old 06-11-2018, 09:32 PM
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