I'm sure it was all user error. I fit mine no problem and I know a buddy who has them on a few of his bikes, all makes and models.
There are two different mounting points on the throttle tube you have to use the correct one. It's pretty obvious, one will be real loose and the other will be perfect.
I plan on buying a set for the Honda, but the set I bought for was for Suzuki and it fit my Hyosung bars and throttle assembly with no problems. Please, if it will fit my Hyosung, I don't see how they couldn't get them to fit more popular bikes.