What's the correct chain for 73 CR250? the one I have is still just a hair to wide, I need the most narrow chain they make. Anyone know what chain it is and where to buy it? I have a DID narrow x ring enduro chain on it now and its still about 1 to 2mm to wide. Thanks!
I imagine you need a chain without x- or o-rings. Try to post at the "Vintage/Left Kickers" -section, I'm sure you'll get a good answer there.
Stock chain was a 5/8" X 1/4" non-oring. I think the tapered countershaft allows the sprocket to creep further onto the shaft after multiple removal and installs. If you're having a problem with the chain rubbing the countershaft seal retainer you can remove 1 or 2mm from the side of the retainer that contacts the case. I've done this on the four speed oval case motors using a belt sander and the chain rubbing problem was solved.