2000 YZ426 trans guts in 2004 WR450?

I have a line on a 2004 WR450 with a busted tranny.  I also have what's left of a YZ426 that I've been parting out.  Any chance I could swap the transmission guts into the WR case?  I know this would not be ideal gearing, but if I could get it running for cheap then I would take that drawback.  Anyone done this?  Thanks!

Edited by 2002maniac

Won't fit without a lot of machine work. 

Is your trans in good shape? If so, ae you interested in selling it? 

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