YZ426F crank, compaitble with 450? 400?

3 replies to this topic
  • RRmike

Posted July 31, 2005 - 08:58 AM


I have a 426 in my shop thats been through hell.

It dropped a valve and the previous owner had it rebuilt. The original shop never looked at the engine to determine why it failed, just replaced the parts and sent him on his way.

Well the engine did the same exact thing a few hours later and the owner took it apart himself.

He found the valve stuck in the piston and set it aside, sold it a year later to someone who brought it to my shop. It has been sitting here for months since I cant find cheap parts for it readily (was trying to not kill the guy on parts)

Now I am trying to find a new used motor for it, or in the least a crank that is half cheap but I cant find anything 426 other than brand new.

Anyone know if the cranks are the same or compatible in any of the other years?? Anyone have one they want to part with? otherwise I need a whole motor.

I can get a new hotrods crank complete in budget, but need to know if it will work.

  • Hick

Posted July 31, 2005 - 12:53 PM


The crank can't be rebuilt? It isn't just the rod or bearing??

Don't know about the 450, but I sort of doubt it would swap...

Pretty sure a 400 crank would work though, but you would need the 426 rod as the small end is bigger on the 426.

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  • RRmike

Posted August 01, 2005 - 01:08 PM


The timing gear is chewed up, it keeps dropping valves into the piston from what the customer says it happened twice.

  • Hick

Posted August 01, 2005 - 03:49 PM


The timing gear is chewed up, it keeps dropping valves into the piston from what the customer says it happened twice.


If you are comfortable w/ assembling one then all you need is the left half, in which case a YZ 400 part would do the trick.

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