 His string of victories with four stroke machinery earned him a reputation as a four stroke specialist.However, Crosby also showed himself to be a capable rider of two stroke machinery when he rode a Suzuki RG 500 to an eighth place ranking in the 1980 500cc world championship, including an impressive second place finish in the 1980 German Grand Prix held at the challenging Nurburgring.Crosby was contracted by Suzuki GB to defend his Formula TT world championship and to compete alongside teammate Randy Mamola in the 1981 500cc world championship.