If I'm not mistaken, the 05 and the "original"
rrr shared the same flywheel, clutch shoe, flyweights. Newer RRR's..??? IDK... never owned a trip R. The list below should give you some idea what will work... there are also aftermarket flywheels, clutch bells, and pinions.
RR/RREvo = to big
05, RRR = same
RR/RREvo, 05 = same
RRR = smaller first gear threads, smaller pinions, smaller bearing
RR = wrong pitch
RREvo = right pitch.. to small
RRR = 1st gear to small
, 2nd will work as a 1st on an 05