Suzuki Engine ID help

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7/24/2017 2:57 PM

Picked up a 90 RM250 with a good bit of parts on it but the big part was it came with a bottom end that fits on both this frame as well as my 92. However, I had a few guys in the RM groups on Facebook say they think the motor looks more like it belongs on an RMX. Can anyone help ID? The number printed on the crankcase reads J112-102111Photo