Are they the ones that go under the grips or inside of the handlebars? I have been thinking about getting these (
http://www.dual-star.com/index2/Rider/heated_grip_kit1.htm) which are alot cheaper, but didn't know how well they would work inside of the bars and I'm leary about putting them between the bars and the grips...I have the Kury grips which are hard enough to get to bond as it is.
His are the ones that go in the bars. No need to take the grips off to install them...or so i am told. (I didn't do that install for him.)
I would caution against going with any heater products that are on a on-off switch. When they are on...you have full voltage...regardless of outside temperature. The grip covers I have get to 140F. have you ever tried to hold your hand on something 140F?? It gets damn HOT!!! Whatever I get in the future will have at least a 3-setting switch on it so I can adjust the temperature.
Joe