 The 350cc crown went to Takazumi Katayama on a special three cylinder Yamaha built in Holland, making him the first-ever Japanese world champion.Barry Sheene made it two premier titles in a row, winning from two Americans, Steve Baker and Pat Hennen.The season was marred by numerous fatal accidents, including a terrible crash at the 350cc Austrian Grand Prix that claimed the life of Swiss rider, Hans Stadelmann and seriously injuring Johnny Cecotto, Patrick Fernandez, Dieter Braun and Franco Uncini.