Take your own advice. If you really want to know then read the manual, you should have one, right? Regardless of what I say you'll disagree so enjoy.
Friendly advice: Read through posts a bit more before commenting, both yours and the OP's. You'll see that you generally skim the first line then comment before you actually comprehend what was being asked about then have to backpedal. See the thread about the ROLLING CHASSIS WR450, not FRAME for a recent example, you initially said it was way to high a price and how you paid less for a frame (duh, let's hope so) then went back after others pointed out it was a ROLLING CHASSIS, clearly stated in the first post, and said no, good price. Reading is all about comprehending.
The (US) WR lights run off AC, BD has a mod to change them to DC and its why you need a new reg/rect and they don't come on with the ignition switch turning on, only when the bike runs. The rest of the bike is DC. And with that I'm done.
The only thing that you have explained right was that the AC magneto and rectifier/regulator but I had already mentioned that and anyone can understand that!
It seems that the headlight and taillight of US 2003 WR450 does run off AC power (I admit I was wrong about that) but you still have no understanding of how anything works.Also, how do you expect to help the OP if you have no understanding of how anything works (apart from lights and rectifier)?.
In reply about your friendly advice- Point taken and I will be looking more closely before I post.
While you were right about the headlight running off AC (thank you for clearing this up), you are still wrong about ''everything else running on DC''. You can't even tell me how the starting circuit works, let alone the trigger circuit that runs off AC. How do you expect me to believe you when you can't do this?
like you can answer my questions when you have not even answered one?
In your head it all just magically works off DC (apart from the[color=#800080] [/color][color=#0000FF]HEADLIGHT[/color][color=#800080] [/color]
[color=#800080])[/color] but on paper, it just looks bad.
I have colour coded a wiring diagram to make the trigger and starting circuit easier for you. I have made the AC power green and DC red so you can see which is which. I will leave it to you to work the rest out.
Edited by Barra8, June 10, 2013 - 05:16 PM.