2003 yz450f rolling chassis- what engines are compatable

6 replies to this topic
  • aj_clarke

Posted September 17, 2008 - 02:00 PM


Hi folks,
I have access to a 2003 450f rolling chassis (minus the engine) and was wondering if anyone has attempted to install a 06/07 engine into this frame.

For sure this is crazy but I can't seem to locate a 03-05 complete engine.

Thanks in advance,

  • grayracer513

Posted September 17, 2008 - 03:12 PM


I would imagine that it would be difficult to fit an '06+ engine. Even if the hard points lined up, there is the matter of the more vertical cylinder incline angle, which could cause some carb clearance issues with the frame, etc.

  • aj_clarke

Posted September 17, 2008 - 04:54 PM


Thanks Gray,
Tonight was my lucky night, located an 04' engine- should be a better fit with that extra gear!

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  • grayracer513

Posted September 17, 2008 - 06:28 PM


What extra gear?

  • AnotherRedHead

Posted September 18, 2008 - 01:21 PM


isnt an 03 a 4 speed

  • yz426em

Posted September 18, 2008 - 01:24 PM


So is the 04 engine your looking at.:excuseme:

  • grayracer513

Posted September 18, 2008 - 01:25 PM


isnt an 03 a 4 speed

Yes, it is. And so is an '04 and an '05. So again I ask, what extra gear?

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