timing problems


4 replies to this topic
  • rmx250rider

Posted July 06, 2009 - 12:25 PM

#1

having some issues with getting everything timed back, just replaced the rings and wrist pin and forgot how the cam went

  • grayracer513

Posted July 06, 2009 - 12:53 PM

#2

Crystal ball is fogged up. We have no idea what engine you're working on.

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  • bendover932

Posted July 06, 2009 - 01:18 PM

#3

lmao @ fogged up crystal ball..:worthy:

  • rmx250rider

Posted July 06, 2009 - 01:42 PM

#4

yz 400f

  • grayracer513

Posted July 06, 2009 - 03:13 PM

#5

Download a manual:

http://www.yamahaown...ook.com.au/?r=0

If you can't get one for a 400, use the book for any year 426.

In summary:

  • Line up the "I" on the flywheel (NOT the "H") with the timing mark.
  • Install the exhaust cam with the "E" mark at 9:00 o'clock, aligned with the gasket surface of the head.
  • Install the intake cam with the "I" mark at 3:00 o'clock, aligned with the gasket surface of the head.
  • Retract, install, and release the tensioner.
  • Recheck the timing.






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