In 1975, the Japanese motorcycle manufacturer launched the Honda CB750 Four K5, a naked motorcycle sold only in 1975 that came available in only two colors, such as the Planet blue Metallic and Flake Apricot Red.
The bike featured the instrument faces in dark green with the speedometer numbers increments of 10, the side covers were smaller than the ones on the K0 model without slots in the leading edge, a chromed upper fork, the white pinstripe on the tank was wider than on the K3 model, a black headlight housing, and larger taillight and turn signals than on the K1 model.
Also, the bike featured a two-cable operated throttle with one pulled to open and one pulled to close, a four-into-four exhaust system with four mufflers, and a four-cylinder air-cooled engine linked to a five-speed manual transmission.
In addition, the bike came equipped from the factory with standard features, such as an analog instrument cluster, a chromed dual exhaust system with two mufflers on each side, a dual seat, a wide handlebar, a center stand, and wire-spoke wheels.
The bike was built with a tubular steel duplex cradle frame that housed a non-adjustable telescopic fork with a 296 mm disc squeezed by a hydraulic caliper on the front wheel and dual preload-adjustable shock absorbers with a 179 mm drum braking unit on the rear wheel.
As for power, the 1975 Honda CB750 Four K5 packed a 736cc four-stroke four-cylinder air-cooled engine fueled by four Keihin carburetors that helped deliver an output power of 67 hp with maximum strength at 8,000 rpm and 60 Nm (44 lb-ft) of torque available at 7,000 rpm.