jetting question yz426f 2002


6 replies to this topic
  • rebelrider

Posted November 18, 2005 - 01:54 PM

#1

anybody know the proper jetting for this model?

stock
and
aftermarket exhaust (brand unknown)

need quick assistance

thanks

friend wants to know if there is a raceing setting for jetting too, i told him i think thats only with aftermarket exhaust.......

  • Yak

Posted November 18, 2005 - 02:01 PM

#2

Stock is:

42 Pilot Jet
4th clip down on needle
162 Main Jet

  • ONLY4STROKES

Posted November 18, 2005 - 02:09 PM

#3

Stock is:

42 Pilot Jet
4th clip down on needle
162 Main Jet

Yep, I can vouch for that.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • rebelrider

Posted November 18, 2005 - 02:15 PM

#4

cool, still need to check his to see what his is set at.....

do ya'lls head pipes glow red while at a stop, then cool off once moving
he said that when wide open it stops glowing, but out back when he first starts it up even at idle, his head pipe glows, ive lit my cigerette off it without even touching the darn thing...... any suggestions

  • Yak

Posted November 18, 2005 - 02:35 PM

#5

Thats normal... Nothing to be alarmed about.

  • 642MX

Posted November 18, 2005 - 04:38 PM

#6

My jetting is:
pilot 42 (stock)
needle (stock)
main jet 160
fuel screw 1.75 turns out

  • rasta

Posted November 18, 2005 - 05:27 PM

#7

i have a hmf performance slip on on my 02 and tried every clip position and jet size . it still rides like a 2-stroke





Related Content

Forums
Photo

BIGBORE FOR YZ450F 2006? by Taattie94


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 5 replies
Forums
Photo
Supercross

Wilson the Blue Privateer by jetfuel


Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  50 replies
Forums
Photo

The "going back to the other darkside" adventure... by Monk


Dirt Bike   Make / Model Specific   KTM   250/350/450/505 SX-F & XC-F (4-Strokes)
  • Hot  113 replies
Forums
Photo

2016 YZ450 by CaptainKnobby


Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies
Reviews

Yamaha YZ450F 2017 by Chris.GVS


Yamaha YZ450F 2017
  • * * * * *
  • 1 review
  • Last review by Tommyk_55
  • On January 15, 2017
 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.