Well put it on today, I was wondering what the extra washer/seal things was for, thought it may be for a different machine. Well it pays to read the directions, it told me to remove the factory dust seal which i did and replaced it with the supplied unit. Well I have to say the feel is awesome. Takes very little stregth to get it on the throttle as compared to the stock unit. It may take a tad getting used to, seems like you may have to move your hand out on the grip just a tad to allow for the greater length of the lever. I'll test it on a ong ride whn it gets warmer out. Thanks for the input guys.