Here in AZ we ride year around. I have Gerbing heated glove liners. With gloves over them they are bulky and if I wear the liners alone they only heat the backs of the hands and my fingers still get cold, so I decided to try grip heaters. The grip heaters are currently on sale for $20 at Cycle Gear. They are a thin metal grid mounted on an adhesive tape with a removable paper backing. I could not find much on installing them. I decided not to install the wires inside the bars since I could not do that with the throttle anyway. After adding shrink wrap tubing to the wires, I filed a notch at the end of the grip for the wire. Where the wires solder to the grid is a raise area so you will need to trim out some rubber inside the grips for the wires and solder. On the throttle you will need a loop of wire to allow for the throttle rotation. On the left side the heater grid applies directly to the bare bars. On the throttle side the grip heaters apply to the plastic tube that comes out of the throttle mechanism. On the left side I routed the wires in the existing harness. On the right side there was not enough room the the existing harness to add wires. I routed along the existing harness and added a corrigated harness to both. I did not use grip adhesive and soaked the grips in hot water and added a little soap and they slide on easily. After a heating cycle they appear to be tight.
The heated grips come with a dropping resistor and a high/low switch but I did not use them. I already had a 12V outlet at the front of the seat which I use for the battery tender and power for the heated gloves. I have a Gerbing dual temperature controller for the gloves with an unused side for a jacket. I added to grip heater power cable a connector to match the Gerbing temperature controller and plugged the grips into the jacket plug. The Gerbing temperature controller is held to the tank with velcro. Everything seems to work fine. With a bare hand the throttle seems warmer because the plastic throttle parts insulate the heat from the steel bars. I will ride Thursday to see how everything works.
trackside grip.jpgGrip with notch cut for wire and solder.jpgWire loop for throttle.jpgTemperature controller and wires.jpg