426 head on 400 cylinder??

8 replies to this topic
  • 711

Posted June 14, 2004 - 12:12 PM


I got a line on a good deal for a 98 400F, but the head is junk after it dropped a valve. I have access to a 02 426 head, but my question is will it work on the 400 cylinder?
I may get a 420 kit for the 400 since the cylinder needs replating anyway so that would make up most of the difference in the bore size. Thanks!

  • Vanilla_Gorilla

Posted June 14, 2004 - 12:55 PM


I'm pretty sure the only difference is the cylinder bore and the titanium valves. It should work if you do a 420 bore kit. :thumbsup:

  • sirthumpalot

Posted June 14, 2004 - 04:39 PM


Be warned, depending on what came apart and how much it spun after the parts got into the motor, you may need more parts than just the piston, head and cylinder.

  • PumpkinHumper

Posted June 15, 2004 - 01:58 AM


Another option is to check with www.enginedynamics.com They work miracles with heads that you would think are junk. Its worth a call.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • 711

Posted June 20, 2004 - 09:19 AM


the head is junk....so does anyone know if a 426 head will work on a 400 cylinder??? will be going with a 420 kit.

  • SFO

Posted June 20, 2004 - 03:49 PM


it will work

  • 711

Posted June 20, 2004 - 05:05 PM


Do you know from experience or what?

  • SFO

Posted June 20, 2004 - 05:30 PM



  • rlmeskimen

Posted June 21, 2004 - 04:55 PM


Not to threadjack but if you need a 400 head...I have one from a 99 WR400 if you need one. Give me an email at rlmeskimen@msn.com


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