After 10+ years bikeless I just bought a 2000 EX500R. I'd like to pick up an aftermarket exhaust for sure, seems like K&N filters & rejetting is pretty standard too. Does anyone change the gearing? I really don't need a top end of 140mph & being a car nut I know the benifits of lower (higher numerical) gearing. I'd be particularly interested to hear what products you've been happy (or unhappy) with, especially exhaust. -Also what retailers have good prices? - I'm completely out of the loop when it comes to bikes & don't really have time for real thourough research presently. Thanks in advance!