Well, depends on the length of the list I guess. He did manage to win races on that bike Honda forced on him.
Oh....I was going off the question above regarding titles from MotoGP, WSBK, and national title like AMA superbike. Side note....WSBK riders that moved up to GP and won were Chris Vermeulen and Spies
See, I knew I'd forgotten someone. :up: I was considering those that made their true bones in GP racing. Only Checa of your list counts on that. Corser and Bayliss were WSB guys who boomeranged back from GP to WSB after washing out.
Actually, that was my original inquiry, who's won a championship in BOTH World orgs. Then it morphed into who's been in both orgs and won a Championship in WSBK. Hence my enthusiasm to see Nicky move over to WSBK and win a championship there.