quite some time ago (several years) I had put a 250f shock on a kx 500, the clevis was longer, I cut it down and redrilled the hole making it the same. I think I also switched the clevis from the 500 shock to a 250f shock for a buddy, that is a bit trickier because you have to get it positioned properly or your rebound adjustment won't work right. Right now I'm using an Ohlins 250 2t shock on my 500 in the 05 250f chassis works really well