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2008 Wr250f With 2006 Wr 450 Fcr 39

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Hi, I Just Got My New 2008 Wr 250f And I,m Doing Jetting And Change Oem Carb Fcr 37 To One From Wr 450f . Does Some One Did The Same? Please Help Me With Jetting. Thanks.

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You are going tio find that a 39 on a 250 is a bit too much carb.

Even with the stock 37, it is borderline excessive. You are going to have serious bog issues, that if you can resolve them, the solution is going to mess up high rpm running. You can have too much of a good thing.

Unless you are running super moto with a fully worked carb, stay with the stock carb. It is plenty.

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