Are you still running the original 6-volt system? If so, the generator can be put into full output by removing the "F" wire at the voltage regulator, and attaching it to ground with a jumper lead. At a fast idle, the voltage should jump to 7 volts or more when charging against a fully-charged battery. If you don't get a noticeable voltage rise with the field grounded, try polarizing the generator by shorting the armature wire at the regulator to battery voltage momentarily. Some oldtimers just arc a screwdriver blade from the Bat. to Arm. terminal, but I prefer to remove the wire and touch it to the battery wire for half a second or so, just long enough to get a pretty good spark. This sets up the "residual magnetism" in the generator housing that triggers the field current. Grounding the field wire puts the generator into full, unregulated output so don't rev the engine up much. If this test works, the generator is good, and you need to start looking into regulator or wiring problems.
Jerry
