The 80cc class was created in 1984 to replace the 50cc World Championship, which had been contested from 1962 to 1983. The FIM's decision to upsize the displacement limit from 50cc to 80cc reflected a desire to broaden the competitive field and attract a wider range of manufacturers and riders while retaining a distinct small-displacement category at the foot of the Grand Prix ladder.
Like its predecessor, the 80cc class was dominated by two-stroke machinery. The slightly larger displacement offered somewhat more scope for engine development, though the class remained highly specialized and required purpose-built racing motorcycles far removed from any road-going equivalents. Japanese and European manufacturers participated, and the category served as a developmental stepping stone for young riders aspiring to progress through the GP classes.
The 80cc category, while slightly more accessible than the 50cc class it replaced, still attracted a narrow pool of truly competitive manufacturers and teams. The class ran as a supporting category at Grand Prix events, and the number of entries at any given round reflected both the specialist nature of the machinery required and the relatively limited commercial appeal of the division compared to the larger and more prominent 125cc, 250cc, and 500cc classes.
Spanish and Italian manufacturers and riders continued to feature prominently in the 80cc era, reflecting the regional concentration of expertise that had characterized the 50cc class. The class ran for just six seasons before the FIM elected to discontinue it after the 1989 season.
After the 1989 season, the 80cc class was dropped from the World Championship calendar. The class had failed to attract sustained broad participation and was widely seen as occupying an awkward middle ground between the popular 125cc class and the even smaller 50cc era it was meant to replace. The 1989 season marked the end of any sub-125cc category in the FIM Grand Prix motorcycle racing World Championship.
From 1990 onward, the 125cc class became the entry-level world championship category, a role it would hold until 2012, when it was itself replaced by the Moto3 class.
The 80cc World Championship represents a transitional and largely forgotten chapter in Grand Prix motorcycle racing history. Its brief six-year lifespan placed it between two more celebrated eras: the 50cc golden age of the 1960s and 1970s, and the long-running 125cc era that defined entry-level Grand Prix competition for decades. The class produced a small cohort of champions who are recognized in FIM records, and its existence underlined the difficulty of sustaining viable competition at very small displacements within the Grand Prix framework. The 1984 switch from 50cc to 80cc, and the 1990 withdrawal of the class entirely, traced a gradual consolidation of GP classes that would continue into the 2010s as the 250cc class became Moto2 in 2010 and the 125cc class became Moto3 in 2012.