A fourth world championship in a row for Honda'sMick Doohan with another dominating performance. He broke Giacomo Agostini's record for victories in one season with 12 wins. It was also dominating year for Honda with eight of the top ten riders aboard Hondas. The Yamaha and Suzuki teams were in disarray.Kenny Roberts left Yamaha to start his own venture with a lightweight, three-cylinder Modenas.Wayne Rainey's team was left with the inconsistent Norifumi Abe and Sete Gibernau, a rookie.Daryl Beattie wasn't able to come back from head injuries and retired at the end of the year while Anthony Gobert failed a drug test and was dismissed by the Suzuki team. The Elf team soldiered on with their Swiss-Auto V4 but Aprilia decided to pull their V twin from the 500 class at the end of the year.