hey i am going to pick up a 2002 cr 125 this weekend and before i buy it i wanted to ask a few questions. i am getting this bike for 4,000 canadian. its in good shape well maintained and has aftermarket bars, new top end and swingarm bushings. its never been raced. it is other than the bars totaly stock. if i did get it what would be the best upgrade for preformance? thanks aaren white