I just put one on mine. It's the top mount that connects to the cylinder. I noticed with just a quick trip on it that it viberated pretty bad, which I was expecting but, it seemed to have lost bottom end, does this make since? I also change the rear sprocket, that maybe what i'm feeling but I was just wanting to make sure.
Thanks!

 

Check your belt deflection, also check to see if the new mounts changed your clutch centers. I believe it's supposed to be 10 inches. If this is less the belt will be starting out higher in the primary clutch, more like second gear. Doc

 

my quad is back home from the shop with those race mounts installed on it with the new
ignition upgrade kit,i'll let you known what i think of those mounts in few days...

 

i think the new mounts work good for me,but i didn't have put that one down low the frame,still a 90 durometer there with rubber only,there is only a slight vibration when i let off the thottle down low,cauze the frame is absorbing the vibes of the motor,but engine ALWAYS stay straight forward,very good gain on top
when cluthing is good.