Electro-saki

Just a couple of corrections I needed to add:
The controller I bought is (not Kelly) Curtis PMC model 1204-412SU RATED at 48volts, 300 amps.
I think this is a good match with the GE brushed, motor.

AND I'd forgotten that this version of the KZ400 (1978) had a 6 speed gearbox. I just bought two new sprockets for the final drive; reduced the rear from 45 teeth to 43 so I'm thinking I can get up to highway speeds well enough.

Would still like to hear from anyone who can offer a suggestion for the gear ratio I might try at the DC motor - crankshaft.
-Jeff