The 1991 Grand Prix motorcycle racing season was the 43rd F.I.M. Road Racing World Championship season.
Mick Doohan (3) leads Kevin Schwantz (34), Wayne Rainey (1) and John Kocinski (19) at the 1991 Japanese Grand Prix
John Kocinski
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John Kocinski is a retired American Grand Prix motorcycle road racer whose successes include winning the 1990 250cc World Championship, and the 1997 Superbike World Championship title.
Kocinski at the 1990 Japanese Grand Prix