c1972 Honda CB350/4 Motorcycle
In 1972, Honda released its CB350 Four, a four-cylinder motorcycle with a displacement of 350cc. While Honda was already marketing a CB350 with a twin engine, the company decided to bank on the success they enjoyed with its other two larger predecessors the 750 and CB500 Four, two other four-cylinder bikes in their line-up. The CB350 Four only lasted until 1974, but garnered a good following thanks to its small, but powerful engine and smooth styling.
The 1974 Honda CB350 Four sports an air-cooled 347cc four-stroke straight four engine, with a single overhead cam valve-train. The fuel system uses four 20mm Keihin carburetors. There are two valves to each cylinder. The cylinder bore in this engine measures 47mm, and it has a 50mm stroke. The compression ratio is 9.3 to 1. The ignition uses a battery and coil system, and the starter is electric, with a kick-start backup. The CB350 Four's engine is capable of producing 34 horsepower at 9,200rpm and is capable of accelerating from zero to 60mph in 8.4 seconds, with a top speed of 98mph.
With an increase in collectability over the last few years good examples of these classic 70s machines are becoming increasingly harder to find.