jpfmotors
06-15-2010, 11:33 AM
I have a quick question I am running an 06 450r with stock exhaust and core removed and a hrc airbox lid I have a up coming race and the sound requirements are 96db I think i need to put the insert back into the exhaust my question is how mutch lower should my jetting be as far as the main jet and should i have to change the pilot also?