The output of the generator on the 33, 35, 40, 50, 60, & 75 horse motors was limited to 10 amps. Further, not being an alternator, they did not produce the 12 volts until 1500 to 1750 RPM. Harley Davidson has a regulator that fits this discription.
The alternator for these was designed by Motorola. A brushless electronic system that had a designed continuous output of 35 amps. I saw 40 amps for a while when I put in a dead battery. This dropped to a couple amps when the battery became fully charged. Parts for these were expensive when they were being mass produced. Today? A new motor might be cheaper.
