Yz250f carb on a yz400f


4 replies to this topic
  • Yammer-Hammer

Posted January 20, 2014 - 02:01 PM

#1

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?

  • tang426

Posted January 20, 2014 - 04:43 PM

#2

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

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  • Yammer-Hammer

Posted January 20, 2014 - 05:03 PM

#3

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

  • tang426

Posted January 20, 2014 - 05:06 PM

#4

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

  • Yammer-Hammer

Posted January 20, 2014 - 08:59 PM

#5

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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