Wiring Question

[Joe6v6]

I will be using the Rectifier/Regulator combo (see pic) from HVC on my RD400. All the old wiring is gone & I have most of the new in place. One question is about the Green & Brown wires on the combo unit that go to the generator brushes (I think ) . On the attached Rd400 wiring diagram it appears to show a connection to 12v on the Brown wire. I am assuming that if you plugged this unit into a stock harness that connection would be made somewhere. My harness is long gone - So is this correct? Run a fused 12v connection to that wire? I have ran into other diagrams that seem to confirm this but I want to be sure. Any help or info is appreciated.   .   Joe

[m in sc]

THE 400 UNITS CONTROL THE rotor by switching the ground on/off as needed(exact opposite on a 350). so yes, it needs a switched 12v source to the brown wire . fusing it isn't a bad idea of course, but if can be fused from the feed wire.  on the stock harness, if you look, it's on the 2nd to bottom fuse in the box in the diagram.

[Joe6v6]

so yes, it needs a switched 12v source to the brown wire

Thanks - just wanted conformation.   .   

On another note - Is there a simple way of determining that the charging system is operating correctly? after the motor is running of course.   .    Joe

[m in sc]

volt meter @ battery terminals. shouldn't really go over 14v , and should see over 12.5-13.00 at 1500-2000 rpm.

[Joe6v6]

volt meter @ battery terminals. shouldn't really go over 14v , and should see over 12.5-13.00 at 1500-2000 rpm.

Thanks for the info, Even though this bike will have almost the bare minimum of wiring its still quite a challenge. Especially to make it look nice.   .