I guess the summer is good for working on the sled. I have a 02 xc 500 and have been looking to do some performance enhancements. Biggest problem I have found is that there are not a lot of performance parts avaliable. Has anyone modified their 500 and gotten good results. If you did what was your modification. I am trying to descide if it is even worth modifing. I have considered reed, sliencer, ect.