y is it when at an idle my regulator wont charge but if i rev it up it will and then i let off the throttle it goes back to not charging, could any one help please?

 

So, I threw in another regulator and all seems well - the "customer" (a friend) is happy and the toy is out of my shop/garage. I suppose I should have just gone with the obvious from the start - if the voltage applied to the battery isn't increasing with rpm, it's the regulator/rectifier. Something had to be wrong there.

Thanks for all the help - I definitely have a better understanding of how it works now!

 

I'm glad you found a regulator that is compatible .