They are from a WR racer, but I agree the drilling is bit screwed up
WR is pretty desireable, they were a 750 but not huge hp..or revs
One of the racers was referred to as a ball job..bearings rather than bushings on most if the shafts..higher HP... I think that was the WLDR
If you ever get to the AMCA meet in Tenino in August, you may see some of them bikes..