First off, I have had a 04 WR450 for a week now and love it. I have done the following mods. Removed Snokel, removed exhaust insert, and cut down the throttle stop. The break-in is complete and I'm checking the valves tonight. 1. My first question is, which exhaust insert should I get?? I like the power and sound but its just too loud. 2. I know its running lean, but what jets should I get. I'm thinking going up to a 48 pj, but dont know if I should go to a bigger main or just raise the needle? 3. Which skid plate and rad. braces are the best? Is a rad. brace and rad. guard the same thing? Thanks for any help on these quesitons.