engine swap

does anyone know if a motor from a 2003 yzf 450 fit into a 2002 yzf 426 frame.if so,is it an easy swap.what else do you have to change??thanks

Don't have an answer for you, but the yamaha website would be able to help a little.

Yamaha Parts

You can print off the pictures of the frame/chassis and compare what is different about them.

From my observations, it looks like the bottom motor mounts are the same, but the top ones are definitly different. You would probaly have to have a machine shop mill you some special mounts.

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