YZF450 06 problems, sudden stop

6 replies to this topic
  • ljw350

Posted May 08, 2009 - 11:10 AM



My friend was riding hi 450 06 today and is stopped.

The engine has had a full re-build with about 8 hours on it. All new parts.

He said it seemed like he missed a gear and then all of a sudden stopped. now won't turn over.

Any ideas please

Could it be gearbox?


  • ljw350

Posted May 08, 2009 - 09:46 PM


found the problem.

Broken valve

  • finthat

Posted May 09, 2009 - 06:46 AM



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  • desert-rat660

Posted May 09, 2009 - 02:19 PM


that blows especially on a new rebuild

  • BC3

Posted May 09, 2009 - 10:33 PM


Just curious, what valve failed? and did he replace the valve guides?

  • ljw350

Posted May 11, 2009 - 12:13 AM


sorry don't know what one failed. we think this was caused by heat as all the water had gone from the rad's

  • milner57

Posted May 11, 2009 - 12:54 PM


Posted Image
this is the reason it stopped,

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