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View Full Version : Mass. Jetting Settings (Help)


DROCKYZF450
10-17-2006, 01:02 PM
Being new to four strokes and bikes in general i just bought an HMF pipe and am getting ready to install it i was wondering what people from MA are doing for JETTINGS. if you could help i would appreciate it.
DROCKYZF450
10-17-2006, 01:03 PM
I have a 04 YFZ 450 All Stock As of now
yfz450les
10-17-2006, 01:14 PM
if its a slipon try 162-165main jet 45-48 pilot jet 2.5 turns on fuel screw if its full exhaust system try a 170.
DROCKYZF450
10-17-2006, 02:59 PM
It is a Full
YFZ450 11x
10-17-2006, 04:46 PM
I live in Middleboro Mass and have the HMF full w/ a 13:1 cp piston WR crank and a port and polish and am running a 180 main 48 pilot middle clip on the NCQV needle and like 2 1/2 out on the fuel screw. although I go down to a 178 main and a 45 pilot in the summer. Hope this helps.
You plan on racing next year?