Why won't it work? If it is the position you can use double side tape (the foam type) and it will hold fine. I have had mine that was since 03. Using the tape you can put the lever where ever you want it.
Okay, I installed it tonight with some help from FJR&R. Works fine, although I did had to grind down the grips somewhat. I'm not excited about that, even they turned out looking just fine.
I installed the vistacruise the one that's made to fit most Yamaha's) and didn't have to drill, grind or cut. Just had to move the brake lever over slightly to make enough space. A little touchy to calibrate so that it isn't too tight or slips off but other than that it works just fine.