The 'average' Rotax installation is 138 - 142 lbs. Then the propellers are typically 5 - 20 lbs lighter. The flycatcher will be hauling around approximately 100lbs more weight than it needs to.
It will be doing that because Cessna will get the engine for peanuts - 'cos actually that is about what it is worth.
I presently fly a zodiac 601 with an O-200 and I'm in the proccess of building a replacement with a 912S. Chalk annd cheese in nearly all aspects.
But on the positive side it menas that the LSA market is likely to be every bit as good as most people hoped. If only we had the Euro equivalent....