I'm using the Dual Star grip heaters, and BMW honeycomb style grips, and Warm & Safe heat troller. This set up seems to work great.
The standard heater kit from Dual Star or Symtec comes with the left heater hotter than the right, because the heat soaks into the aluminum bars. So I called Dual Star and they sent me a piece of shrink tubing for the left bar, to insulate it and keep the heat from going into the bar. Then because the clutch side heater is the hotter of the two, I had them send me 2 clutch side heaters instead of the reg kit, they did charge a little more, but worth it because now both sides are equally hot.
Also, if you go with the shrink tube to insulate the left bar you will need 2 throttle side grips, as they are 1" and the clutch side is 7/8" before shrink tube, 1" after.
I'm also using a G2 throttle tube which is aluminum, so I put a couple layers of electric tape on it so as to not soak up heat either.
Then the wiring options. I have the white wire going to one troller wire, and both, the blue and the red going to the other troller wire. Be aware this wiring set up is very hot :devil: and I never need it more than 1/2 or 3/4 on the troller.