I just picked this bike up (2002 WR426) and it already has a powerbomb header (dont know if is an MX or SX....maybe you guys can help me ID it) with the stock silencer (which has a GYT-R insert). Do you think this is a sufficient set-up for power gain......so much that it would be a waist of money to get some other silencer? In other words, would my money be best spent elsewhere? So far I know it has: YZ timed Re-jetted (feels spot on) Not sure if it has the Power now (or James Now) but Im going to pull the carb this weekend and find out. As a side question: Have you noticed odd chain wear on this bike? My links are worn on the top and bottom sides so much that its flat instead of "figure-8" shaped (bike only has 400 miles)......hope you can visualize that.