Need help with 03 yz450

7 replies to this topic
  • justinbuck63

Posted January 28, 2016 - 05:58 PM


Runs for a short time then seems to hydro lock.. At tdc cam marks are in line.. What could this be?

  • BoxcarWilly

Posted January 28, 2016 - 07:26 PM


Seems to be in time.. Hard to kick over.. Will start but won't run long.. Seems to hydro lock.


Valves are tight. 

  • justinbuck63

Posted January 28, 2016 - 07:28 PM



  • justinbuck63

Posted January 28, 2016 - 07:37 PM


This thang is gettin on my nerves!! I'm about to burn it!! Lol

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  • greenhammer75

Posted January 28, 2016 - 08:04 PM


Make sure cam covers aren't to tight. This binds the cams from spinning freely and makes it hard to kick.

Edited by greenhammer75, January 28, 2016 - 08:05 PM.

  • Wild Alaskan

Posted January 28, 2016 - 08:37 PM


check your cam cap torque and oil pump before you start it again or it might cost you $800.

  • grayracer513

Posted January 29, 2016 - 06:51 AM


Connecting rod.  The cages crack in the rod bearing and they turn into a random roller clutch. 

  • justinbuck63

Posted January 29, 2016 - 06:53 AM


Damnit!! Thanks for the help tho.. Seems like I'll be spending 1000 bucks....

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