Removing the regulator from a v star 1100 - 2000 Yamaha V Star 1100 Classic

Probably under the seat.

Yes - it's a regulator/rectifier. It's behind the lower right cover, which is directly below the battery cover. Will need to remove the pipes to get to it. Some will drill 2-3 holes into the front of that cover to allow more air to flow over it and keep it cool.... Bob

If you need further help, I’m available over the phone at https://www.6ya.com/expert/robert_beef7390c57fac0d

Check the regulator and alternator/diode pack. If the regulator is faulty that could be you problem.

It should be in the front on the frame.
the heat sink doodad

How's the battery holding up? Check the voltage on the battery and also check to see if it is bubbling a lot. 13.8V is optimal for the battery charging with the engine running, but up to 14.4 is common. If it's running a lot over that and the battery is making a lot of bubbles, probably the regulator is the problem.

If the battery is low on electrolyte, the regulator doesn't have anyplace to dump electrons, and that could also be a problem, so make sure the battery connections are good and tight, too.