I just thought I'd put this out there for anyone that wants to keep their hands warm without having to install permanent grips.
Plus, I use "Grip Puppies" over my gel grips to add a little more comfort. Bar mounted grip heaters wouldn't provide much heat to my hands.
http://www.aerostich.com/aerostich-warm-wrap-grips.htmlNo, I don't have any experience using them..............................yet.