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The Honda CB 750K single-handedly revolutionized motorcycles when it was introduced in 1969 Andrew Dernie/Photodisc/Getty Images The Honda CB 750 K was first introduced in 1969 and sent ripples throughout the motorcycling world. Utilizing a four-cylinder engine with dual-overhead camshafts, it was a technological leader in the field and outperformed most any rival motorcycles. Many motorcycle historians suggest that the CB 750 K was the first "super-bike," and went on to influence modern motorcycle design for years. The CB 750 K was produced until 1978 before major changes were made by Honda.
Engine Specifications: 1978 Model
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The 1978 Honda CB 750 K is powered by a 748-cubic centimeter, air-cooled, four-cylinder engine. The cylinder orientation is inline and featured dual-overhead camshafts, DOHC. The compression ratio of the engine is 9.2:1 and the bore and stroke measurement is 62 x 62 millimeters, mm. The fuel is delivered by four 30-mm Keihin carburetors. The ignition and starter are electric.
The CB 750 K's engine produces 48 foot-pounds of torque at 7,000 revolutions per minute, rpm and 77 horsepower at 9,000 rpm.
Transmission, Suspension and Brake Specifications
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The CB 750's engine is mated to a six-speed transmission that transfers power to the rear wheel via a chain drive. There are telescopic forks for the front suspension and the rear suspension are dual shocks with 101.5 mm of travel.
The front brake on the CB 750 is a single 275-mm disc unit, whereas the rear brake is a 180-mm drum unit. The front tire is a 3.25-19 unit and the rear tire is a 4.00-18 unit. The front wheel is 19 inches in diameter where as the rear wheel is 18 inches in diameter.
Weight, Capacity and Performance Specifications
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The dry weight of the 1978 Honda CB 750 K is 520 lbs. and wet weight -- with all necessary fluids -- 562 lbs. The fuel tank contains 5.3 gallons of gasoline. The standing quarter-mile time is 12.4 seconds and the top speed is an estimated 125 miles per hour.
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