I managed to repair the speedo cable on mine- I used a brass fitting cut down to hold the cable on, because the plastic holder on the cable housing broke.
I drilled out he center of the metal piece on the end of the cable itself, and JB welded a pop-rivet shaft filed to the right shape to the end. That got the speedometer working again. I used the shaft from a pop rivet because it was aluminum, just needed to be filed square, and could easily be bent to center it after the JB weld hardened.
My pedal arms are still hitting the side covers, but I think I have some that may swap over, but I haven't tried them yet.