the hfx 9's came stock on my 03 enduro and i never felt like they performed like they were suppose to, i eventually picked up a pair of avid juicy 5's and although i experienced the "turkey warble" on my first ride out, they really outperformed the hayes hfx 9's in braking performance. i could never get rid of the never ending rotor rub/chime with the hayes hfx 9's. it got to the point of where i was having to adjust them before every ride. they never really grabbed like they were suppose to, i'd clean the rotors with alcohol, lightly sand the pads, tried the EBC red pads and still didnt have that much success.classiccanadianblizzard said:Throw them in the garbage!! I had nothing but problems with mine...so I got avid juciy 5 and love them!