I suspect Rossi had his bike set up the best, coupled with the excellent mechanical grip of the factory Yamaha and his extra weight, gave the old guy enough grip to dominate the race. He rode great and deserves his accolades.
It was stated that no grip led to tremendous wheel spin that destroyed the tyres down the middle. The Ducati bikes' power is overwhelming the tyres anyway and they possibly have less natural grip than the Yamaha's anyway.
A Yamaha 1-2 is a good day anyway [emoji1]
Yamfan, I agree you except about the weight. As a few people mentioned, Vale is only about 1kg heavier than Jlo.