High voltage

[coochs]

Hey all.

This is my first post, but I love all the help in here!

I recently pulled my 1977 R100RS out of my shed where it had been sitting since 1989 waiting for my wife to allow me to spend some $ on it. Ended up with new clutch, re-built carbs, new coils/plugs/wires/points, new tires, and a bunch of minor cosmetics. Only thing left that doesn't work is my clock :(

One thing that worries me, though, is that the voltmeter is consistently at 14 volts or higher, and pegs as long as the engine speed is above 4000. I'm guessing a faulty regulator somewhere, but will this do any damage to my battery or other electricals if not corrected?

Thanks for any advice!

[soldemall]

You can about bet on a bad regulator. It should run about 14.2v, but if you're normally higher than that, you will overcharge the battery. Easy to replace.

[20774]

Be sure and read what's happening at the battery terminals...that's where it really counts. Typically you can't trust a voltmeter of unknown quality mounted somewhere upstream of the battery. A faulty regulator would result in voltages approach 16v at 4K RPM...at least those are the kinds of numbers one sees if you bypass the regulator as a part of checks of the charging system.

[coochs]

You can about bet on a bad regulator. It should run about 14.2v, but if you're normally higher than that, you will overcharge the battery. Easy to replace.

Thanks...kinda thought so.