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
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
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
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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