Bert at Small coil rewinds used the Early KX80 stator plate and flywheel his own CDI box then a LC250/350 Yamaha twin lead coil ring Bert to get a Quote
Keep in mind still have to make a back plate to fit the Suzuki motor plus change the taper on the flywheel bit of stuffing around but it did work very well
Lots to choose from comes down to Price and with a Sidecar might need a heavy Flywheel weight to drive the little 250/315 working hard
Pump locked on halfway plus 32 to one ratio premix and try to stay under 9000 rpm working that hard plus the weight Suzuki crank b/end will shit itself
Cheers