head leaking on 10

4 replies to this topic
  • moto278

Posted May 22, 2011 - 11:27 AM


Ok i just reassembled my top end on my 10 450 with new gaskets and piston and rings from cp. I just had it out and noticed air coming from the little hole next to the coller line on the kickstart side of the motor. After a quick ride noticed it also spits out a small amount of oil as well. Any thoughts?

  • Chazmagnum

Posted May 22, 2011 - 11:52 AM


Check your valve cover gasket. It's tough to get in the right spot.

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  • todds924

Posted May 23, 2011 - 10:27 PM


Only way oil can come out that hole is through the valve cover gasket leaking around the spark plug hole
Pull your plug cap/coil and I bet its all oily

  • moto278

Posted May 27, 2011 - 05:21 PM


So on putting ny motor back togethr i dropped a smallbolt in the timing. Chain. My flywheel puller doesn't fit. Where can I find one that works?

  • grayracer513

Posted May 27, 2011 - 07:19 PM


The flywheel puller for an '06 or later YZ450 will fit, as will one for an '02-'08 CRF450.

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