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Usable or not?

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Deano400:
This is the centre journal. Looks marked compared with all the others. Is this usable or should I try and find a replacement? Having said that I can't find any of the letters and numbers yet!!

Laverda Dave:
it appears to be scored on one side with what looks like some heavy wear on the other side.  I don't think I'd want to use it again but how deep is the damage, can you feel it with your nail, look at it with a magnifying glass, any deep marks will significantly reduce the oil pressure between the shell and bearing face.
First thing I would do is measure all the bearing clearances with plastigauge to see how much wear is in the crankshaft.
The shells have colour codeings and not numbers/letters.  The numbers on the back of the shells mean nothing. You need to use the letters stamped on the rear of the crankcase half together with the markings on the crankshaft, these are very difficult to see.  You need to clean the crankshaft first and using a good light you should see the etched markings (don't be fooled by the 'printed' markings on the web, these are easier to see but also mean nothing! The numbers on the crankcase combined with the crankshaft lettering will provide you with the shell colours you need.  You may be very lucky and find some paint still on the shell (the paint normally wears off in service), use a strong magnifying glass.
There are a few threads on here about bearing markings.

Deano400:
Thanks for the advise Laverda. I will set up a good light and see what I can see.

Deano400:
Yes Laverda, I can feel it with my nail. A couple of the others are worse than I thought and all have shiny patches to some extent. Now I suppose I have to look at the big ends as they could be as bad. Not a good weekend, looking more expensive every day.  :(

philward:
Projects ALWAYS go that way Deano - when you strip them, you don't want to take the chance and the price of the the refurb goes up - happened with all the rebuilds I've done. Good thing is that the bike won't depreciate when you've spent all that cash!

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