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?

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  • 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:





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