2005 450X, currently running the stock sizes and chain. While the teeth look ok, the chain is shot so figure I'll just replace all of it at once. I'm not sure sure of the stock sizes but I'd like to add a little bit of low end....loosing top speed is fine. I'm pretty much just a trail and woods rider. Suggestions on a sprocket/teeth front and rear combo with an O-ring chain size? I'm not brand sensitive at all. Thanks!