cam timing

6 replies to this topic
  • panosyz400f

Posted December 12, 2004 - 02:51 AM


Can someone tell me any website's that have information, how to assemble the YZ400f engine.
something like the repair manual.
Thanks :cry:

  • bushy

Posted December 12, 2004 - 01:33 PM



If you need any other help with specific questions myself and yz400man can help you. We are experianced at this :cry:

  • panosyz400f

Posted December 12, 2004 - 11:09 PM


it tells me that the service manual is unavailable for this model...
But i appreciate your help.

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  • bushy

Posted December 13, 2004 - 05:07 PM


Well, what do you need to know. There are members around here that are like walking manuals.

  • panosyz400f

Posted December 13, 2004 - 10:44 PM


i would like to know how to do the cam timing plz?

  • bushy

Posted December 14, 2004 - 04:22 PM


First off, make sure the piston is at top dead center by removing the two flat head plugs on the ignition cover and turning it with a socket till the I appears in the middle of the top hole. It looks more like a l then a I, and it is sorta small.

The cams should look like this when all done and timed correctly:

Posted Image
Posted Image

Hope this helps :cry:

If your having trouble.. the 250f have the same procedure.. just dont bother counting the links or pins, it gets too confusing.

  • panosyz400f

Posted December 14, 2004 - 11:16 PM


hey guys
I want to thank you for your help.
this is my first 4strocker and i need to know everything about it.
Ive been riding a KX500 for the last 6 years and it seems to be alot easer to rebuild the engine.
There is a Clymer's manual on the way

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