I just picked up a 89 Polaris Indy Trail 488 for a good deal and was wondering if there is anything that I can do to increase the overall performance of the sled? I've never owned a sled this new, so any help would be great. All my friends ride sled that are alot newer and want me to go riding with them this winter(if we ever get snow) and I don't know if I'll be able to keep up(I'm a pretty big guy). Also, can I put a diffrent rear suspension on this sled to lift it up a bit higher? Anything you can help with would be appreciated.