I've had HeliBars on my 929 for a year now. I liked them so much I bought the company. OK, not really, but I liked them so much that I decided when I finally broke down and got the 6, the first thing I'd do is HeliBars.
929: I won't go back to stock. Not a day and night's difference, but a very noticeable difference. I'm 47. Bottom line is, I can ride a lot longer and more comfortably now. My 20something riding buddies take more breaks than I need. The 06 R6 is the worst by the way. The ZX10 is a close second. I think if I put a set of lower pegs (Wildhair) on, the 929 would be that much better. If I do, I'll report back. I have an Ohlins rear shock and Dan Kyle re-did the forks for me. It rides nice.
When I put the Helibars on the 929, they were 2" wider than stock. I hate wide bars. After some careful measuring, I cut .55" off each end and redrilled. Even tho the HeliBars on MY 929 are an inch wider than stock, they still look and feel good. From end of rubber grip to end of rubber grip, my bars are 26 3/4". You'll probably have to re-route the clutch cable. No biggie. If you use the stock bar weights, they're a bear to get out. Take the weight off. Drill a hole thru a board and put the screw thru the board and back into the weight. Now you have something to pull on. Loop a soft tie thru the fork end. Loop that dude to something substantial and pull. I figure mine to aprox 90 lbs of force to get out. None of which is hard. If you get stuck, or have a ?, let me know.