Just got these in the mail today. Beefy sons-a-guns. They are solid with a big alloy piece that is threads on to. I also installed the '06 599 engine mount spacers while I had it apart as they are a little larger diameter than the '04 599 version.
No matter how much you push the envelope, it'll still be stationary.
Didn't do much for me, was less of a spark show than it could have been though. I can say that this time I didn't tear a hole in the tank (happened on my 02 w/o sliders) but I also didn't slide on a caliche shoulder this time around.
if you love your motorcycle, set it free.. if it comes back and hits you.. you highsided
I think what some have done is to tap the frame hole and then bolt the slider to the frame, at least that is how I did mine.
Not trying to give you crap, my sliders are made of stainless steel, not exactly ideal.