Originally Posted by seniorasi
Looks like you have it covered. If you use a single lead from the battery to the bus bar it should work as a ground as long as it doesn't corrode.
Do you have any suggestions on a tpe of bus bar or where a good place to mount it is? This brings up another good question, where are the grounding lugs on these bike. Like on my truck I can find 3 or 4 places where things are grounded and connect to them.