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Chrome Speedo

WR Motor in YZ Frame

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I have a rare opportunity to build a cool street machine. Does anyone know if a 04/05/06 WR450 motor will fit into an 2003 YZ450 frame? Any idea what the differences are in the frame? I would have two complete bikes so additional small parts are not a problem.

I thought about the tranny swap option, but considering the cost/benefits, why not get e-start for a couple bucks more!

If anyone knows where to find a new leftover WR that would also be cool.


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