yes, i have the sparky for a kx 60. i am not really impressed with it either. it does it's job as a spark arrestor o.k., but it is so big that it rubs on the back tire when the bike bottoms. other than that, i have not had a problem. i would much rather have a pipe and silencer from fmf, but it was $89 (sparky) vs. $200(fmf). it has never come loose from riding or crashing. i would say, if you primarily ride trails, get the pipe/silencer combo. i think it would be better in the long run. if you just need something to bilt on for the occasional trail ride, the sparky is tolerable.