I picked up an 89 with spun bearings. Honda has discontinued most everything for these old treasures, but I need to find some oversized crank bearings. Anyone have any leads or know the best way to cross reference with other bikes?

 

The crankshaft is not available, but it looks like the bearings are.

Honda Motorcycle Parts 1989 CBR600F A CRANKSHAFT Diagram

 

if you need oversize, i'd plastigauge it and have a local machine shop make some for you; that is, if you can't find exactly what you need on partzilla, ronayers, or bikebandit first