well here is the deal, your suspension is fixible. as for some of the questions. the rear rear shock on your sled is PPS fox shocks. this shock can not have a licker added but you can revavle it to be stiffer. and yes all the ryde fx shocks can be rebuilt. as for springs i would worrry to much. wiht fresh rebuilt shocks you spring will not need to be cranked on that much. the only springs i would probably replace is your rear torsion spring, coil spring really dont ware out, it take three to four times the riding to make the coil springs shot compared to torsion. get a new set of torsion springs from your dealer they are the best one, aftermarket spring unless titanium (very expensive) will not last as long and just are not as good. i can help you with whatever you need, i have rebuild many suspension and know lots of shock rebuilders. 2 questions, where do you live, and what kind of riding do you do most?