Maico had increased the 360cc bike to almost 400cc, and with this extra power, the season was shaping up to be a successful one. Jonsson achieved victories across Europe and was on the verge of winning the world championship title. However, at the last race in Ettelbrück, Luxembourg, Jonsson suffered an unfortunate incident that repeatedly dashed his world championship ambitions: during the race, a fork tube came loose in the triple clamp, protruding so far upwards that it pierced the fuel tank, costing him the victory and thus the championship.