Charging woes!

[xrz828]

Ok, here's the scoop.

With a fully charged battery my '80 750F wont charge.

Rotor tests good, stator has continuity through all yellow wires and no shorts to ground.

I have been over the wiring quite meticulously and my connections are solid.

I installed a new reg/rect today since I was convinced that was the issue, apparently not!

With the bike running, I don't seem to be getting any voltage to the brushes through the black and white wires coming from the reg/rect. (Tested at the connector to the stator) So then if I understand the system correctly it's not correctly powering up the rotor. Does anyone have any info on why this may be?

Any help would be GREATLY appreciated! Thanks for reading

[sgtslag]

First, and foremost, have you downloaded the Factory Service Manual (FSM) from the home page on this site?...  It has the necessary troubleshooting steps within it.  It should also have complete schematics for tracing out wiring to locate an open/short/whatever.

The Battery supplies DC current to the Rotor to activate it as an electro-magnet.  If you are not getting voltage at the brushes, start tracing back from the brushes, with your DVM (Digital Volt Meter).  Start by tracing voltages at connectors, which are easily accessed, looking for where the voltage should be, but isn't. That will tell you which segment of wiring is failing.  If necessary, you can get alligator clips for your leads:  clip them onto some sharp metal sewing pins, and poke the pins through the wire's insulation, to test for opens within a segment of wire, if you want to repair the wire, rather than replace it (add heat-shrink tubing, splice it together, then cover and apply heat to the tubing, to seal it against weather).  Cheers!