Hi padmei !!!
Everything up to the drive shaft, should be the same, not real sure about the drive shaft and final drive, as the mono frames and twin shock frames, are different .
Most things across the airhead line, from the '81 model year up to the end of airhead production in 1995 are pretty much interchangeable, the R65 had some model specific parts .
There are a few members here, that have gone the cafe style or off road style, one is in NZ, user name Motu .