2002 yz426f and 2007 yz250f valve shims?

iv got a 2002 yz426f and i recently had the valves done so i bought a hot cams shim kit. i didnt know if they would work with my buddys 07 yz250f when he goes to have his valves checked. please help!

They won't. The 250F uses a shim that's 2mm smaller in diameter.

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