2006/2003 yz 450

i have a blown to hell 2006 yz450 and i was wondering if anyone knew if the cylinder and head from a 2003 or newer would bolt up to the 2006 bottom end?

No, it won't. You need a Gen2 top end, '06 or later. '03-'05 YZ450's, '03 -'06 WR450's, and '04 - '07 YFZ quads are all Gen1 450's

thanks, your a good man

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