yz450 topend on a yz426 motor??? will it work

[partyboy300ex]

will a 450 topend work on a 426 motor i know the yz400 and 426 motor are interchageable but i dont know about the 450 and i need a new top end and i cant find a big bore for the 426 so i'm wondering if the 450 will work
Thanks, Aaron

[lonestar 426]

no!!:grr:

[partyboy300ex]

ok so does anyone know if there is a company that makes a big bore for the 426 motor?

[ss440ex]

Athena....

[markvette]

how big you wanna go. i have a cylinder that has been bored 2mm over which makes a 426 a 446. it needs replated.

Mark