Yes De Grasse
I thought you'd say something like that
So for Lorenzo, corner speed means entering slower with wheels in line but going around the actual corner as fast as possible on the edge of the tyres
For Doohan, corner speed means entering the corner fast, sliding the rear, then spinning up the rear coming out of the corner on the fat part of the tyre
So there are two versions of conrer speed then?
Now, about Doohan spinning that rear. More from JB:
Doohan's crew chief Jerry Burgess believes the 1990 NSR was the best ever - a huge leap forward. HRC dumped the 90-degree firing order, copying the more forgiving Yamaha's double-strike 180-degree configuration to tame wheelspin. With a good front tire Doohan would've won the title (1991), for he finally had a chassis suited to his high corner-speed style, instead of the point and squirt technique used by Gardner and the Yankee ex-dirt trackers.
But it took Doohan a while to fall in love with the droning BIG BANG motor. HRC man Shoji Tachikawa remembers: "The engine note made it sound slow, so riders thought they were going slow. Mick was very surprised when he came into pits and saw his times."
In fact lap times weren't faster but they weren't slower either and the reduced wheelspin improved tire life, so race times were faster.
Doohan's input was starting to show dividends in other ways too - a whole new generation of riders were starting to win on the NSR. Former 125 and 250 men who would have fried their brains on old 500s were now competitive. There were two reasons for this: Big Bang power and Doohan's riding style, that had changed the direction of chassis and tire development away from rear-wheel steering to high corner speed. This suited the Europeans who had never been able to do that tail-sliding dirt track stuff. Now guys like Alex Criville, Alberto Puig, Loris Capirossi, Carlos Checa and Max Biaggi could ride and win on a 500.
Which was the point of me giving the quote that 'made your day' about the bikes had got easier to ride. Because by the time Rossi arrived they were riding them like 250 GP bikes and had bee for some time - and Rossi had come striaght out of 250. But for 2000, Honda had made the engine more aggressive again, which is why, Burgess said, that Rossi crashed a number of times that season, mid-corner. He was caught out by the sudden power increase in the rev range. They wanted the previous engine which was smoother but didn't get it. Burgess says they would have won the title with the previous engine. So what he's saying is that Rossi didn't adapt and use dirt tracking style to ride around the issue of an engine that suddenly hit hard in the rev range mid corner. He wanted the smoother engine for more corner speed - 250 style.
Interestingly, the comments on the big bang engine and lap times and tyre wear were heard again in 2004 for Yamaha's new cross plane crank M1. A bike with superb corner speed.