Unless your nonstop overheating the temps in the case should be minimally warmer then running NA. There are cooling jackets all over maintaining case temps.
i thought the HO's where only cylinder cooling, not crank cases also... or thats what i heard, the first years they did the crank cases was the ski doo 1000 motors, or the 800R motors and newer, also supposedly why the 07 800r's had all the crank clearance problems?