650 silver/black

I'm super new to the ski world but have plenty of experience outside of them from building auto and motorcycle engines and more. So I'm learning here and I know this stuff is pretty old. But to the point, I bought an x2. The motor spun the stator and sheared off half of one of the bolt holes that hold the stator in place. So this motor has great compression, but due to the damage my friend gave me a silver 650 motor.

The silver motor cylinder head, well both domes are pitted. Nothing crazy but I'm assuming since I havent seen another, that the domes should be smooth.

So I'm curious will the black motor cylinder head work with the silver motor?
 
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