I have had very little experience with dry sump systems, British bike and Yamaha VX1100 are exceptions. I understand what happens when wet sumps are overfilled, the level gets up where the crank counterweights begin frothing the oil. It would seem that dry sump systems would not have much problem with overfilling until there is little air space in the tank/reservoir. Yamaha VX1100 Waverunner have dire warnings about overfilling the oil tank, they'll start blowing oil into and wet the air filter. This dry sump motor is apparently sensitive to overfilling based on the warnings seemingly everywhere. I've even seen advice to keep the level between the low and full marks and don't fill to the full line. Why is this dry sump system that sensitive if indeed it is? I've run my Waverunner somewhat overfilled at times and haven't seen any problems.