Over this past winter I spent a fair amount of time doing some upgrades to my '77 R100/7. Mostly doing handling, braking and cosmetic modifications. However, once the bike was back together and I started it for the first time, I've noticed an issue that wasn't there before. My generator light isn't behaving as it should. In fact, it seems to be doing nearly the opposite of what it should. At idle, the light goes off and once I'm on the throttle it comes on very brightly. Also, when I turn on the ignition, the generator light is also bright, as it should be.

My first thought was to pick up Rick Jones Classic Boxer Charging to see if it would lend some insight. In reading through his book, it seemed like my Voltage Regulator may have been the issue. But, I swapped out, what I believe to be a functional, used voltage regulator, and it did the same thing.

In full disclosure, I had one of the moments when putting the bike back together, that makes me feel a little less than bright. Fairly recently, I replaced the battery with a MotoBat. They seem highly regarded and I've been really pleased with it. However, these batteries have 4 connection points rather than 2. And I found out the hard way then the connections aren't symetrical.  Obviously, I wasn't paying close enough attention when reinstalling the battery and had it sitting in the cradle backwards. I attached the positive terminal first and then when attempting to hook up the negative terminal, I was treated to an impressive sparks show. It took me a minute to figure out what I had done. I then swapped the terminals, turned on the ignition switch and everything seemed to work as it should. 

This past weekend is when I finally had the bike ready for its first spin. It started just fine and seems to run with no apparent issues, other than the generator light burning brightly as I motor down the road. I'm wondering if I have fried the diode board or maybe something else. Any sagely advice would be greatly appreciated. 

Much appreciated. 

Bombadil