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02 250F and 2003 450F... Same shop man?

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Hi all. I just got a call from a friend, he picked up a 2002 YZ250F. I have a shop manual for my 2003 YZ450F. He wants to check his valves, and I was curious if the 250 and 450 head are the same, maintenance wise.

Anybody know?

Thanks! :)

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