Do you have a multimeter? Hook it up to the battery and rev the engine. The voltage should increase higher than 12. If not, you aren't creating charge current. I'd check the 3 wires going to rectifier and make sure you are getting power off your stator.

If you are able to, download the manual to our bike and go to the section about the charging system. Real good step by step in there.

Hope that helps! Check that stator!

I get right at 12 volts at the battery on, off, and at higher rpms. It doesn't change. I have done the test on the rectifier with a multimeter and everything looked normal.

Ill check the good book.

It is also possible that one or more of the wires is damaged. They come out of the cover pretty near the belt, and if they were improperly routed or secured they could have gotten chewed up by the belt.

Make sure your ground wire is secured properly on the engine as well, a bad ground will cause all sorts of mischief  

Ohms check, with engine stopped: should be infinity (open) from any of the yellow wires to ground. This with the three yellow wires disconnected from the regulator. Should be continuity from any yellow to any other yellow, but Clymer's doesn't give the reading other than saying "low resistance." Any pair should be about the same resistance as any other pair.

Voltage check: three yellow wires still disconnected, and engine running. Should get above 100 volts AC between any pair of yellow wires, with the engine at 5000 RPM.

Mines an 86 and there was no difference with the Rectifier when I swapped it out. If you need to replace the Stator then you're going to have to pull the left side engine cover. Yes, this will require draining the oil. The stator comes off with the cover so you'll be able to get out of that nasty crouch you were in undoing all the cover bolts. A new stator is about a 100 bucks, and you can find them a lot of places online. RMStator has a service department, I think that they are based out of Quebec.