 He followed this with a victory at the Imola 200 race in April.While Yamaha had introduced a new 500cc V4 engine for Kenny Roberts, coded YZR500 0W61, the Agostini-Yamaha team was left to race on the older Yamaha square-four cylinder YZR500 0W60 motorcycle.Crosby jumped into the lead at the start of the season opening Argentine Grand Prix however, he was forced to retire after a couple of laps due to a crankshaft failure.