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Yammer-Hammer

Yz250f carb on a yz400f

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Will a 2007 yz250f carb fit on a yz400f motor? I know the 250 uses a 37mm carb and the 400 uses a 39mm carb. But is the OD of the engine side of the carb the same on both carbs?

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It should work but you gonna have a good time jetting it

Thats all i needed to know. I dont mind if its a bitch to jet cause this carb i found for only $50 and the cheapest FCR 39 i can find is $200

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You are gonna lose some top end power I'm sure

I'm not worried about a few horses up top because i ride almost always bottom to mid unless im on a straight away

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