Honda SOHC Fours

Honda SOHC fours means Honda four-cylinder motorcycles with a Single Overhead Camshaft engine. SOHC = Single Overhead Camshaft: one camshaft sits in the cylinder head and operates the valves. Fours = the engine has four cylinders arranged across the bike. In this context, it mainly refers to classic Honda four-cylinder models such as: CB350F — 1972–1974. CB400F — 1975–1977. CB500K — 1971–1973. CB550K/F — 1974–1978, although the exact carburettor and jet must be checked. CB750K/F — 1969–1978, with fitment varying by carburettor version. They are often described as Honda SOHC fours because the engines share a similar single-cam layout and four-cylinder design. The phrase describes the engine family, not one specific carburettor model.