yz250f Engine cases from 07 to 06

hello, are both of the yz250f engine crankcases from 2007 compatible for the 2006 engine? Thanks in advance

They, are different part numbers, that does not mean they will not work, but I can not answer that for you.

I have compared photos and there is at least a slight difference at first glance....Thanks

Did you ever figure this out? 

I used an 01 in an 08 frame and have the 01 crank and gears in an 07 crankcase in my 08 frame now.

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