426 big bore love one

6 replies to this topic
  • stef wr426

Posted July 29, 2005 - 01:46 PM


got a 3 year old wr 426f; can not have another bike . need more power to have in reserve, please tell me any thing you know; i think i want one. :applause:

  • jonova

Posted July 29, 2005 - 01:49 PM


bore it to a 444 (2mm over), Hot Cams and some head work. It will fly. :applause:

  • stef wr426

Posted July 29, 2005 - 01:56 PM


where do i get parts ;i would love to fly.

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  • 4Stroke4Life

Posted July 29, 2005 - 03:11 PM


do you know of any kits for the 98-99 YZ400f??? also looking for a little more a$$.i have the decomp. mod. soon pipe and header, but it is due for a piston and rings, would like a bigger one if possible. :applause: :eek:

  • stef wr426

Posted July 31, 2005 - 12:59 PM


really don't know . i need knowledge myself

  • Satch0922

Posted July 31, 2005 - 05:04 PM


this is easy....check with Eric Gorr



Posted July 31, 2005 - 06:43 PM


these guys make a couple of kits alsoThumper Racing

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