Hello all. It's been a while since I've posted here.
I have to replace the crank shaft in my 1976 R60/6 (Mfg. 10/75 - as stamped in the engine case). I seized a big end bearing on the rear (right) con rod. I've pulled the old one out, and can BARELY make out the three numbers on the bottom of one of the bob weights. It looks like something like "735" or close to that.
My question is, as I am looking for used crank shafts, will a crankshaft from a 1975 R60/6 fit this bike? My engine case number starts with 492... I've found a used one with 734 or the bob weight.
I can't find any information about LWB vs SWB or if this even matters (mine's a LWB). I know there was some issue with parts matching around 1976 R60s, but I don't know that it has to do with engine parts or if that was just related the Wheelbase parts.
Also, besides discoloration or galling on the journals, is there anything I should be looking for on a used replacement?
Thanks in advance for any guidance you can offer.