engine swap

3 replies to this topic
  • timkupchuk

Posted September 22, 2009 - 11:48 AM


does anyone know if a 99 yz400 engine will bolt into an 01 yz250 frame. The carb is included with the motor. Anything to look out for? thanks

  • grayracer513

Posted September 22, 2009 - 01:10 PM


YZ250? I very much doubt it. YZ250F? Maybe.

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  • timkupchuk

Posted September 22, 2009 - 03:08 PM


sorry, I am talking about yz250F and yz 400F engines

  • grayracer513

Posted September 22, 2009 - 03:42 PM


The swing arm pivot/rear hard point may be a problem.

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