Entering a XC event this weekend with my '06 yz450f but I've never had to pass tech with it before. Normally do GP's on a closed course. There's a 99decibal limit, i'm wondering if anyone has ever failed to pass tech because the pipes too loud or if anyones knows what its putting out. I've had a PMB sparky screen and just added their quiet insert but honestly, don't know if its any quieter. I may be bringing the wifes WR250 as backup!