The Fanatic

I'm gonna modify my stocker sunday and see how she runs. I'm a little concerned about getting the jetting dialed in for maximum power (hopefully Indy's jetting guide will get me close)... I'll also keep my eyes open for a yz exhaust if I can find one cheap, just to compare power delivery. Thanks for your help! WR 450's RULE!!! BWAAAAAAaaaAAAaaaAA

Based on posts I've read, the stock yz muffler would be an upgrade from the stock wR. I'd like to try a stock YZ 450 exhaust before I rip the guts out of the stock WR muffler, or spend more money on a Dubach or FMF system.(my wife might kill me in my sleep I'm not sure which years are compatible. any help will be greatly appreciated. I also saw a post mention a yfz/or yzf muffler?? will other model mufflers work? Thanks, Dave