 Moriwaki provided Crosby with Kawasaki motorcycles to compete in the Formula TT world championship and the Isle of Man TT.He placed 4th in the Formula 1 Class at the 1979 Isle of Man TT and finished the season ranked third in the Formula 1 Class of the Formula TT world championship.Crosby's impressive results earned him factory backed sponsorship in 1980 with the Suzuki Grand Prix racing team, operated by their British importer, Suzuki GB.