Born March 1968. In 1990 rode a YZR250 in the GP250 and took the championship title with seven wins. In 1991, rode in the 500cc class with Wayne Rainey and achieved a ranking of 4th, including a Malaysian GP win. In 1992 raced under the same arrangement and achieved a ranking of 3rd, with a win in South Africa. These were the only two wins Kocinski achieved on a YZR500. Subsequently, he raced in the 500cc class with Cagiva and Honda, then switched to the World Superbike Championships. In 1997 became the WSB champion (Honda). In 2001, also performed as a test rider when Yamaha was developing and testing the early version of the YZR-M1.
|Year||Class||Result & Pole position||Machine|
|1989||500cc||35th||PP: 0||1st: 0||2nd: 0||3rd: 0||YZR500|
|1990||250cc||Champion||PP: 8||1st: 7||2nd: 3||3rd: 2||YZR250(0WB9)|
|1991||500cc||4th||PP: 2||1st: 1||2nd: 2||3rd: 2||YZR500(0WD3)|
|1992||500cc||3rd||PP: 2||1st: 1||2nd: 2||3rd: 2||YZR500(0WE0)|
*Results for years with a Yamaha factory team, riding a Yamaha factory machine or ranked 5th or higher riding a Yamaha production racer (World GP, World F750)