No run after head gasket


6 replies to this topic
  • xjmoney

Posted December 24, 2007 - 11:44 AM

#1

2000 426. Found head gasket was blown. I tooked my head down to my local machine shop, head was ok. Replaced the head gasket and got everything back together. The only way to get my bike to start is to pull out the hot start knob on the carb. When it does start it only idles for about half a min. I took the carb apart cleaned it, set the float level and set the pilot screw as per my yamaha service manual. I dont think my cams are off, I have rechecked them and they look good. Sounds to me like I have carb problem,Any ideas?

  • grayracer513

Posted December 24, 2007 - 12:56 PM

#2

Be sure you have the spring plate in the carb the right way up; flat edge with the hole in it goes down.

  • xjmoney

Posted December 24, 2007 - 03:47 PM

#3

I had the float bowl and the the top cover apart only. I blew out the cicuits I could get to from there. While I was in the float bowl I found that the small idle jet was pluged. Is it possible that maybe the needle and seat is not sealing causing a rich condition during idle?

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • BC3

Posted December 24, 2007 - 05:03 PM

#4

compression ?

  • BC3

Posted December 24, 2007 - 05:04 PM

#5

How did it run the last time you rode it...and how long did it sit since the
blown head gasket?

  • xjmoney

Posted December 24, 2007 - 09:15 PM

#6

Compression is good, and the last time I rode it it ran strong but would overheat quickly. The bike sat about a week before the tear down and sat about 2 weeks after tear down.

  • Yamahondaha

Posted August 28, 2009 - 12:57 PM

#7

Compression is good, and the last time I rode it it ran strong but would overheat quickly. The bike sat about a week before the tear down and sat about 2 weeks after tear down.

What were the symptoms of the blown head gasket? Was it just the quick overheating or were there other signs? I am trying to figure out what is causing my overheating issue...:ride:





Related Content

Forums
Photo

2016 YZ450 by CaptainKnobby


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

Thinking about Yamaha 250... by Arctic Pride


Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  491 replies
Forums
Photo

Is it worth it? (Cam and High compression piston) by macgi77


Dirt Bike   Make / Model Specific   Honda   CRF 150/230 F/L
  • Hot  36 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.