Thought I'd share what I'd been using to keep warm this winter. It's the same Symtec 4 zone grip warmer I've been using on my ATV's for many years. Using a spliter on the aux zones the wife and I can both have our heated vests and boot soles plugged in. I also have a heated wrap I put on the streering wheel when my fingers get cold. From this controller we can run up to six heated devices. Works great!
We did around 1,200 miles this winter, we just love out big red for winter riding.
2013 Big Red 862 miles (ours)
2013 850 XP 3,005 miles (mine)
2009 Grizzly 700 7,900 miles (hers)