'77 R100S had the original endless chain (I think?) with 80K. Replacing the crank sprocket but can't see any typical timing marks. The cam sprocket and tach drive gear do have paint marks but not on the teeth. Looking for some advice.
Also my plan to reinstall the crank sprocket is to heat it to about 350F (heat chalk) then with heavy leather gloves install it with one quick motion. Have a sleeve and big brass hammer if necessary!
One last question: How do you use the search function? Very rarely is it much help!