Yamaha YZR500  The YZR500 was the Yamaha Motor Corporation's entry for 500cc Grand Prix motorcycle racing between the years of 1973 and 2002. Riders who rode it to world championships are Giacomo Agostini (1975), Kenny Roberts (1978, 1979, 1980), Eddie Lawson (1984, 1986, 1988) and Wayne Rainey (1990, 1991, 1992). Phillip McCallen won the Macau Grand Prix in 1996.