valve clearances for the 426


12 replies to this topic
  • huntsman337

Posted August 27, 2006 - 03:15 AM

#1

hey guys my mate wants me to check his valves on his 2002 yz426f i did a search and could only find the clearances for a 2000 model cheers fella's :thumbsup:

  • barch88

Posted August 27, 2006 - 05:18 AM

#2

Does he have his manual?

  • grayracer513

Posted August 27, 2006 - 04:09 PM

#3

.10-.15mm intakes

.25-.30mm exhausts

This is for the '00 model only, with the stainless steel valves. Ti exhaust valves set .05mm tighter.

  • huntsman337

Posted August 27, 2006 - 09:39 PM

#4

nah he doesn't have the manual thanks fella's

  • YZ426F Rider

Posted August 28, 2006 - 09:05 AM

#5

My manual for the '02 426 (titanium valves) says .20 - .25 for the exhaust, and .10 - .15 for the intake.

  • Satch0922

Posted September 03, 2006 - 11:07 AM

#6

http://img.photobuck...cycles/3-23.bmp

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

Posted September 03, 2006 - 08:30 PM

#7

My manual for the '02 426 (titanium valves) says .20 - .25 for the exhaust, and .10 - .15 for the intake.



Same here

  • grayracer513

Posted September 03, 2006 - 09:33 PM

#8

That's correct, but the '00 has stainless valves, and different clearances on the exhaust.

  • 2tall2tall

Posted September 04, 2006 - 08:37 AM

#9

Just courious, does anybody know why they went to titanium valves in 02? Was it quicker valve action due to less weight? The longevity seems to be better with the Stainless Steel valves. Any thoughts?

  • Satch0922

Posted September 04, 2006 - 08:41 AM

#10

they went Titanium in 2001. The theory is (i believe) that the titanum are lighter therefore less likely to have "valve float" and I suppose, they respond requicker.

I am sure someone who knows for certain will be along soon.

My 01 426 is still going with almost 400hrs on the stock valves.

  • grayracer513

Posted September 04, 2006 - 09:27 AM

#11

My 01 426 is still going with almost 400hrs on the stock valves.

And those would be the Titanium valves.

  • Satch0922

Posted September 04, 2006 - 09:28 AM

#12

tin fo own dat ! :thumbsup:

  • 2tall2tall

Posted September 05, 2006 - 09:40 AM

#13

My 2000 WR400 has 9K miles of pretty mean AZ single track, and the motor has never been opened and the valves are always in check. I'm impressed. Hope titanium is as good as the SS valves.





Related Content

Forums
Photo

James Stewart back on a YZ450F by YamaLink


Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 replies
Forums
Photo

Chubby dad, looking at bikes , First trip to the orange/black forum ! by Slow_ride


Dirt Bike   Make / Model Specific   KTM   250-530 EXC/MXC/SXC/XC-W/XCR-W (4-Strokes)
  • Hot  28 replies
Forums
Photo

Megabomb Fitment by 288yz450


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 1 reply
Forums
Photo

Michigan Motocross Tires by 288yz450


Dirt Bike   Dirt Bike Regional Discussion   North
  • 1 reply
Wiki
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info


Articles
  • 0 replies
 
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.