Traditionally, there are several races in any case, for various classes of motorcycles, the size of the motor on, and one class for sidecars. Classes for 50cc, 80cc, 125cc, 250cc, 350cc and 500cc solo machines have over time been, and 500cc and 350cc sidecars. Until the 1950s, and most of the 1960s, four-stroke engines dominated all classes.
In the 1960s two-stroke engines began to root in the smaller classes to take. By the 1970s, two strokes completely eclipsed the four strokes. In 1979, Honda has an attempt at the four-stroke back to the class with the NR500, but the project failed, and in 1983, even Honda was winning with a two-500th The 50 cc class was replaced by an 80cc class, then the class was dropped entirely in the 1990s, after he dominated the first of Spanish and Italian makes.
The 350cc class disappeared in the 1980s. Sidecar World Championship events were dropped in the 1990s (see Super-side), reducing the area of 125S, 250S and 500S.
In the 1960s two-stroke engines began to root in the smaller classes to take. By the 1970s, two strokes completely eclipsed the four strokes. In 1979, Honda has an attempt at the four-stroke back to the class with the NR500, but the project failed, and in 1983, even Honda was winning with a two-500th The 50 cc class was replaced by an 80cc class, then the class was dropped entirely in the 1990s, after he dominated the first of Spanish and Italian makes.
The 350cc class disappeared in the 1980s. Sidecar World Championship events were dropped in the 1990s (see Super-side), reducing the area of 125S, 250S and 500S.
