On bathroom scales one with the motor mount bracket on the left rear, stator and flywheel, exhaust manifold on and no carbs or recoil was right at 90 pounds. Bathroom scale so give or take some.
I haven't been around many big bores except the 975s I have done myself. The only thing I know is that I have had bad luck with Wiseco pistons. Either the locating pins for the rings fall out or they seize on me. So I am inclined to not trust any big bore that uses Wisecos. Sorry I don't have any useful input.