426 rod on a 400? maybe a 441 bore kit?

2 replies to this topic
  • R_Little

Posted August 12, 2005 - 06:49 AM


I tore down my 00 wr400 and found a slightly scored rod and a bad counterbalancer key.

I want to rebuild it with a big bore and auto-d cam. I want to go with a 426 rod.

Have 2 questions can I bore a 400 cylinder 95 mm for use with a 426 piston,rod and pin or must I buy a 426 cylinder?

2nd question, who can I use to rebuild the bottom end and crank on a fairly quick basis. Eric Gore is unreachable.


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  • Pincushion

Posted August 12, 2005 - 12:52 PM


Check out this thread

SXP is a local riding buddy and knows his stuff. PM him if you have more specific questions. I'm hoping to have a Lukes Racing 444 ride report this weekend, as long as the final assembly goes without incident. I'll let you know what I think if you're interested.

  • Matt96xr6

Posted August 12, 2005 - 09:09 PM


The bottom end bearing is different sized if I remember correctly. THus you need a whole 426 crank then you need to see if the main bearings are the same size.

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