I have four 750 swingarms in the garage. One is a 77, one is a 73, one might be a 72 and the other year is unknown. The 77, 73, and 72 swingarms all have the slots for the chain guard. The unknown swingarm has a tab with welded nut and no slots. I know there was a change somewhere in the early to mid 70s. Anyone know when the tabbed swingarm was used?
Regards,
John