I have the Universal Vista on my Speedmaster with Kuryakyn ISO grips. I drilled a hole in the bar clamp, then ran a stainless self tapping screw to hold the mount bar. I then sawed off the excess screw end. (I was too lazy to go get a proper tap.)
It works very well and as intended as a throttle lock. As you know, throttle locks are not true cruise controls, by any means, and require periodic throttle twisting to maintain speeds. My thumb no longer reaches the starter button with the mount bar in the way, and so I need to use an index finger or index finger knuckle to press the starter button, but that's not a big deal to me. I'll post a picture later.
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Pictures as promised
http://www.bonnevilleamerica.com/forums/...1099#Post141595