06' yz450f jetting

[esco238]

I know this has already been posted but I can't find it. What jetting specs are you guys using on your new 06'yz450f. thanks.

[mxmob33]

If you're around sea LEVEL, go WITH a 48 pilot AND 170 main. You might have TO play WITH your airscrew after that, probably 1/2 turn IN OR so. Bike runs much better WITH the correct jetting though.

[RideRaceLive105]

move your needle down(im pretty sure, just richen it up), and turn your air screw out another turn.

[esco238]

Anyone else got anything

[FASTFORWARDMX]

We jetted my 06 YZFs on the dyno and came up with the folllwing for the 450F as the best jetting setup:

160 Main
48 Pilot
Fuel Screw - 1.75 turns out
NCYR Needle on the 2nd position

the NCYR needle is a different needle than the stock one.

[MXDave]

quote:Originally posted by FASTFORWARDMX

We jetted my 06 YZFs on the dyno and came up with the folllwing for the 450F as the best jetting setup:

160 Main
48 Pilot
Fuel Screw - 1.75 turns out
NCYR Needle on the 2nd position

the NCYR needle is a different needle than the stock one.

Where did you have that done I have a YZ 250 two stroke with a new Pipe and Porting. Would love to get it jetted properly.

[RideRaceLive105]

can a dyno really replace your right hand

[FASTFORWARDMX]

PINIT MOTORSPORTS in Salinas, CA

(831) 444-6309

ask for Steve

[FASTFORWARDMX]

quote:Originally posted by RideRaceLive105

can a dyno really replace your right hand

Yes, Dynos allow you to view air/fuel mixtures in order to get the perfect jetting specs that would normally take forever if you were to do it by hand.