Yes, the right side is the main mount (heavy part of the block); that left case is thin and hollow. My A- bike only uses a single left mount near the countershaft sprocket, outer shaft bearing. This bike has 3 mount points on the left side, including the primary upper (behind the perimeter frame), and two forward (one is just below the original CBR mount). That long lower left case mount bolt is only holding some of the "pull load" of my chain drive conversion.
The right side has two additional mounts that are behind the perimeter frame......got bolts all over the place! The engine block is actually part of the upper casting (only on right side), and the big lower case is all very thin, similar to the left case (normally back case). During my first build, I broke a lower case while prying on what I thought was a mount hole with a short screwdriver!....learned my lesson.
The oil pickup on these is in the front of the lower case (very front of the sump). I also tilt the engine in my A- bike for the same reason....get the oil pickup well covered.
10% note - that's max wheelbase addition for Modified class, typically in the swingarm.