[DrBob]

Gerbing says the trick is to start the bike before you turn on the controller, and turn off the controller before you shut off the bike. I use the full set up of socks, pants liner, jacket liner, and glove liners on the 800 without any problems. There is a slight dimming of the headlight at idle when I turn the controller on all the way, but I have had no problems with the battery no being fully charged after each ride. I don't have any additional electrical accessories on it, like a light bar or anything like that. Your S83 should not have any problems.
The Harley is a real hoss, powering the full outfit plus a powerful light bar without any voltage drop at all.