How bout another wiring question. Nylon screws?

So I'm wiring an 81 xs650, it has a rotor on it that is not the original and not sure of the year that it came off of. I have everything wired but when I turn on my ignition switch ( which is a generic automotive style) it pops my main fuse. I have the green brush wire going to the green reg/rec wire and the brown brush wire spliced into the brown reg/rec wire and going to the ignition side of my key switch, if I disconnect the brown wire at the brush I can turn the key on without blowing the fuse. Have I hooked this up wrong? Do I need those nylon screws? I searched the nylon screw mod on here and found a ton of posts but usually about earlier bikes so I not sure if it applies here or not. Stock reg/rec, stock stator (I think). Any help would be greatly appreciated. Thanks guys.

HooliganCycles said:

...stock stator (I think)...

Click to expand...

That *could* be it. If it's an early stator housing with early brush holder, the inner brush may be grounding. The later setup had power (brown wire) going to the inside brush...

I'm thinking that must be it, I had a nylon screw ( not quite the right thread pitch but good enough to get it in there and test it) I put it on only the brown wire and am able to turn the motor over and have spark so that's a good sign....haven't tried to fire it yet since I'm welding up the gas tank tonight, but for now I think I will call it fixed and order the right size nylon screws and then see if it is charging when I fire it up. Thanks for the response.

Coupla more things to check:

Does the stator housing have the telltale signs of having been an 80-83 unit, the pickup unit or its mount holes?

The hold-down bands for the brushes are different for those two types. The early (grounded) inner brush is a more L-shaped affair with 3 holes that get grounded. Later is different.

Compare the stator housing, brush holder, and brushes in these two MikesXS pages against yours:

Early: http://www.mikesxs.net/products-30.html#products

Late: http://www.mikesxs.net/products-29.html#products