99 yz 400f head rebuild??

7 replies to this topic
  • captaincaveman

Posted July 26, 2007 - 09:42 AM


Hey guys! Great site! I was woundering if you all could point me in the right direction of getting my cyl head rebuilt? I have all the parts,hotcams stage one,kibble white valves,springs,retainers,locks and seals!
I would like to send it to a reputable builder and get it back ready to bolt on! Also looking for someone to bore and coat the cylinder for a +2mm JE high compression piston!
Thanks for any help...........

  • tntmo

Posted July 26, 2007 - 09:49 AM


For the head rebuild, I suggest Engine Dynamics.

Any work done to the cylinder should be handled by Millenium Technologies.

  • captaincaveman

Posted July 27, 2007 - 08:38 AM


Thanks! I'll look into them.

  • crazyal426

Posted July 27, 2007 - 10:04 PM


Just had my head all done with cams, kibblewhite guts, grind, port, polish, the works. They rock!!!! Best price and workmanship
Good luck!!

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  • captaincaveman

Posted July 29, 2007 - 04:52 AM


will I need any extra parts for the auto decompression cam?

  • grayracer513

Posted July 29, 2007 - 07:48 AM


No. Except possibly a valve shim or two.

  • yz454

Posted July 31, 2007 - 01:46 PM


It would be best to go with 426 rod and bore. 400 rods were not very good and broke on the small end,426 were bigger.

  • captaincaveman

Posted July 31, 2007 - 08:51 PM


I'm just doing the top end for now! When it's time to split the case I'm going to change to a 426!

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