I looked through the Rotax manual (I might have missed it) I could not find how they recommend lifting the engine. I do have an engine host, however, I could not see an built in lifting points.
The factory approves lifting the engine using flexible straps looped around the intake manifolds. Another way is to loop a flexible strap under the crankshaft/prop hub in the front and behind/under the accessory case in the back (be careful not to tweak any wires back there). Two or three friends work well too! The ROTAX is very easy (a one-man job) to mount on the RV-12.