Advice on crankshaft bearing
 

During dismantling of my 2KF motor I found out that the left crankshaft roller bearing (alternator side) could be very easily moved on the axis. After removing the bearing the axis clearly showed a very shiny surface. The diameter of the axis is about 1-2/100 mm smaller than the nominal inner diameter of the bearing.
Is it possible to repair this by mounting a new bearing with locktight or should I take more drastic measures and what are the possibilities?
The motor clearly had a knock and more than normal vibrations before dismantling.

Any advice is welcome

Guy

Drastic
 

This is the bearing behind the gearwheel for the camchain, just to make sure ...

It should be press-fitted, so if it has movement, there is a problem. Installation with Locktite not recommended, this will not handle the forces on the bearing.
Three options:
- Yamaha sells this part of the CS complete with bearing and gear - probably very expensive
- A second hand CS, and overhaul it (bearing, big end (conrod)) - the gearwheel CAN be removed and re-installed
- Weld-on the missing metal and get it grinded to the correct dimensions - I think this might be the cheapest / easiest way to go, although picking up a second hand crankshaft cannot be that difficult either, they almost never break ...

I came across a guy selling some stuff on ebay based in canterbury who had a bunch of stuff, I managed to relieve him of a couple of crankcases.

But I know he is on the XRV forum as well, with a 750 super tenere he is building up. worth asking there, great guy