The main advantages are
1. Use the rod shaft winged a joint angle 90 degrees constantly movement.
2. Using valves Desmodromic no spring valve and intake exhaust. The opening and closing the exhaust and intake valve use celebrated directly.
This is the point that both parts of a machine L-Twin Ducati engine with accelerate twist from around the Slow Idle up until around a high response). And the use of crankshaft in engine and make small pieces.