So I checked the battery with my DVM and it was showing around 15.9 to 15.6 at the battery, the book says the regulator should kick it at 14-15 volts, also it gets pretty damn hot! is the regulator going bad? I've put over 2000 miles on it so far with it no issues, I never thought to check until I put the led headlight in, I put the halogen bulb back in also to see if that helps
Stators put out FULL MAX power for the given RPM.
you replaced filament bulbs with LEDs which essentially removed "all" of the lamp load from the charging system.
The OEM regulator/rectifier unit is a Shunt to Ground type system, that means that it attempts to control the voltage by diverting the excess power to ground.
As mentioned, you have run into "Ohms Law".
All of the Watts of power the bulbs used to pull, are now being dumped into the Regulator, and it has to dissipate the heat load
Just for grins, lets say you off loaded 5 amps of lights for LEDs.
That 5 amps is now being shunted to ground by the regulator, and it now has to dump the heat thru the fins....
5 amps times 14 volts is 70 watts, no wonder the regulator is working overtime. I would advise that you find a Wire Wound resistor of about 3.0 ohms and hook it up to the lighting circuits to replace the load that used to be consumed by the bulbs.
that will reduce the amount of power the regulator has to handle.
I am surprised the regulator is still working, it will burn up soon if you don't help it out.
That wire wound resistor better be mounted in the air, clear of any plastics or wiring harness. It will get blisteringly hot. And it better be rated at 100 watts.