Join Date: Nov 2009
Location: Lander, Wyoming
I will second the effectiveness of the Polly Heater brass inserts with both HI and LOW.
Which usually will fit inside of a steel handle bar with a little clean-up of the interior of the bar.
One might could drill the interior of a 7/8th Aluminum bar to 11/16th ID.
Their advantage is you can then use any brand/size/style/pattern of handgrip you prefer for your hands. And cheaply replace worn/torn grips.
I've never installed the self-adhesive heat grids onto bars and then grips over the grids. I feel the grids could be easily damaged if changing grips.
I hate FAT heated grips and hard as a rock 'Hot Grips'.
Modify at "YOUR OWN RISK"!
Still riding my 1987 KL650-A1. 85,000+ miles & counting