I use the Vista with my ISO's, but I had a modified install. When I put my throttle grip on I left a bit of a space, didn't put it all the way on. I then turned the collar on the Vista around and put it on the grip up to about the end of the chrome ridge, then stuffed the rubber strip in between the collar and the throttle sleeve, from there it was a normal install. Worked GREAT and didn't waste any grip real estate with the collar overhanging the chrome ridge/lip.
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