I've noticed many of the tuners want to shorten the shock for the '13 KX450. What does this accomplish? Is there something wrong with the stock length? My KX feels fine until the track gets acceleration bumps, then both my feet get knocked off the pegs!! I had to stiffen the rebound as the stock setting seemed much to quick for me. But with it stiffened up it's tough to ride when the going gets rough. I've started to think I need either a revalve or to really spend some time on a rough track trying to dial it in.