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Premis
06-10-2006, 06:41 PM
I need some jetting advice for my Yamaha 450. I used to be awesome at jetting 2-strokes but this 4-stroke stuff boggles my mind. Can anyone give me a good idea as to what jets I should be running with the mods listed below. I know you can't get me exactly where it needs to be, but if I can find the ballpark I can get it the rest of the way. So what are some of you guys running?

2004 YFZ450
High comp piston
cam mod
yosh full exhaust
K&N filter - no air box lid
Sunoco Purple fuel
Iowa Weather (70-80 degrees, 600 ft above sea level)

GPracer2500
06-10-2006, 06:58 PM
This might help:

http://www.exriders.com/vbb/showthread.php?s=&threadid=146392

Premis
06-11-2006, 01:49 PM
Thanks for the link