Yes, didn't work out for me on the thumper, but think they will be fine on the twin. Don't get me wrong, they are a work of art and have lots of options on the clamp mount. Very nice quality stuff. Cruising and trail riding was no issue. Sustained high RPMs for me during hare scrambles in the desert didn't work. Just got numb. Doesn't happen to everyone. I'm probably just weaker and older than others.