Trouble With 2000 yz426f!


6 replies to this topic
  • yamaha426riderr

Posted August 10, 2011 - 11:29 PM

#1

I was out riding my bike recently when I was in 4th gear about mid throttle and it killed on me.I started it again an got back down on it an it did the same thing.Afterwards,the bike didn't want to start at all an it felt as if it had lost compression.new spark plug still won't start..could this be the valves.??I hope this is an easy fix..

  • Stinger1133

Posted August 11, 2011 - 06:35 AM

#2

Is there still a good amount of resistance when you try to start it ?

  • yamaha426riderr

Posted August 12, 2011 - 05:02 AM

#3

Some resistance,but not like it should

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • Stinger1133

Posted August 12, 2011 - 05:29 AM

#4

i would do a compression check.

  • yamaha426riderr

Posted August 13, 2011 - 07:52 AM

#5

I'm getting it checked out today..I hope its not anything major..

  • TD-3

Posted August 13, 2011 - 04:52 PM

#6

Did you make sure the valve shims where seated well? I once had a couple of them not seat all the way, which then held the valve slightly open and it woundn't start.

  • grayracer513

Posted August 13, 2011 - 05:01 PM

#7

That was after you worked on it. It won't happen while it's running.





Related Content

Forums
Photo

2016 YZ450 by CaptainKnobby


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

Megabomb Fitment by 288yz450


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

James Stewart back on a YZ450F by YamaLink


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

yz250x vs 450 4t comparisons (preferably desert riding) needed by JakeNorthrupYZ450F


Dirt Bike   Make / Model Specific   Yamaha   Yamaha 2-Stroke
  • 9 replies
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.