450 topend on 426?

Will a close year 2000-2002 yzf 450 cylinder & top end bolt on to a 2000 yzf 426? I have heard people putting 450 top ends on 426. HOW WOULD I DO THIS? AND SHOULD I? Or just stick with 426? Please help

Yes you can oversize your 426 to a 450, but maybe not the way you were thinking of doing it. And just to clarify something for you, the first YZ 450 was 2003.

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