650 has 6m6 cases and different crank. 94-95 701 has 61x cases and 96+ has 62t cases, 701 cranks should be the same. Pretty sure only difference in manifold is bolt size.
Actually, the cranks ARE different. They can be interchanged, though! The 650 crank has a small hollow section which makes it just a tiny bit lighter than a true 701/760 crank.
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