I have both factory heated grips and the Throttlemeister. no problems.
:lol: Have read this thread with great interest since the beginning. I too felt Yamaha was ripping us off charging those prices for the factory heated grips. In fact I'm sure the less expensive grips are identical to the factory grips. Yamaha buys those parts from another source & then gives them a Yamaha part number.
Since I also wanted heated grips (I ride all year long) & I wasn't happy with the Yamaha price or the way the Yamaha Control unit sticks out so high from the dash panel, I came up with a different approach. My friend John has an 04 Honda ST1300 with heated grips. Have ridden his bike in winter & those grips get
HOT. After inspecting his bike's grips (he & I share a garage) I discovered the grips on his bike are identical to the Yamaha factory grips. The control unit is different, & I like it better. So I order the Honda part # 08T50-MCS-100 after searching on the web & found it for $160, & then installed it myself. Here are some pics:
The Honda Thermostat Control Unit shown above in my opinion looks much better than the protruding Yamaha Controller, & I only had to dremmel out the removable square panel.
This photo above shows my set up of grip puppies over the heated grips (yes the grips still get very hot), with a vista cruise control & manic salamander end weights.
I think this profile with a flush mounted control unit is much cleaner than the Yamaha controller. The best part is it works! And I installed it myself.
Just thought I'd share another option for you boys & girls.