Back in the day, one option for wheels for the R90s was a set of Morris Mags. Does anyone know where to source the rear disc assembly for the rear disc? Butler and Smith used a Hurst Airheart unit that mounted below in front of the axle. Would a 77/80 RT rear caliper work or be made to work? Thank you.
I sent you a message and yes you might be able to modify a later airhead caliper mount and caliper to work. I started to do it but had no extra caliper for the final mounting so it stalled right there.
If original parts are unavailable, consider consulting with a motorcycle restoration expert or custom fabrication shop. They may be able to fabricate or adapt existing components to fit your bike. scratch geometry dash