....well i twll ya what... i sent out my forks and shock out toCali to RG3 last year on the 250 rm.. They did a GREAT job. Had to get new fork springs and it cost a few bucks but when i got them back after re-valving, WOW!!!!!! what a difference!!!! they set it up for my weight and 50/50 MX and trails riding, and they did JUST THAT!!!!.....the thing rides great!!!! much more calm on the trails but still hard when it has to be on the MX track!!! I may try "factory connection" for the suspention tune on the rm-z450......this winter of course