The Biggest Displacement Single-Cylinder Engine Ever On A Production Motorcycle

A production motorcycle with a single-cylinder engine of 779cc has kept a high bar for decades, with the 1990s Suzuki DR Big 800S still regarded as the “largest” single-cylinder ever in mass production. The article traces the engine’s lineage from a 727cc single used in 1988 and 1989 models, producing 52 hp and 42.7 lb-ft, to the 1990 DR 800S Big, which increased displacement to 779cc via a longer-stroke design, raising output to 54 hp and 45.7 lb-ft. It notes a later upgrade after 1995 that, according to reporting cited in the piece, didn’t bring visible changes. The DR Big’s inspiration is linked to the Dakar Rally.