What are Stock 04 YZ450F Jetting Specs?

Pilot? Needle Clip Position? Main Jet?

Thanks,

Joe

it tell what they are in the Yamaha manual you got with the bike, If someone doesnt tell you soon when I get home Ill look it up and then tell you.

Pilot #42, Main Jet #165, clip 4th position or center

Thanks for the replies. I read the manual, but sometimes the jetting doesn't actually match the manual. I received a 170 main in a bag with the bike?

Thanks,

Joe :)

Stock jetting will always match the service manual. The 170 is optional depending on your conditions...

My 04 CRF 250 R Jetting was not as spec'd in the manual. Don't believe everything you read!

Joe :)

FORGET WHAT'S IN YOUR MANUAL. CHECK THE CARB ON YOUR BIKE. MY 2003 450F HAS A 165 MAIN (WHICH I CHANGED TO 168 WHEN I PUT MY PIPE ON). MY 2004 450F SAYS 165 IN THE MANUAL, BUT IT HAS A 172 MAIN. THEY DON'T CHANGE THOSE BOOKS THAT OFTEN.

VET28

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