my 03 z ran 70.5 mph stock, i just installed a yoshi tri oval and a 146 main and removed air box lid and it ran 73.6 not sure on that jetting, i have read were some of you guy are runnig 155 mains. please let me know if this sound right[img]i/expressions/face-icon-small-confused.gif[/img]

 

I have a stage 4 trinity header, pipe, k&n no air box lid and a 170 main jet.

 

mbrp slip-on, no lid, 160 main......