An advanced model of the W1 series. It adopted a front double disc (first KAWASAKI to adopt one), a headlight with clearance lights, a kill-switch, a passing light, and a new meter.
This bike was the final model of the CB750FOUR series. It reinforced its torque characteristics at mid-low speed range by changing its valve timing and air cleaner. It also adopted a rear disc brake.
This model was temporarily out of production when the CB750FOUR-II was brought to the market, but was reborn as model K6. It had new colors and a new blinker buzzer sound.
It featured equipment such as the blinker buzzer, the dimmer switch which kept the light on when the switch was moved up and down, or a system that stopped the cell operation unless the gear was in neutral position.
It had an die-casting crankcase. The two-wire compulsory opening/closing carburetor softened the accelerator movement. The design of its tank and side cover was new, too.
It was the first HONDA model to have a double cradle frame, and the first mass-production bike to mount a 4-stroke OHC 4-cylinder engine. The overwhelming performance of the engine, along with its front wheel disc brake and the beautiful split dual exhaust that highlighted the 4-cylinder have made it become the eye-catching leader of the Japanese motorcycle.
This model was based on the ZZR600. It was a supersport bike that equipped a nearly new engine on its 400cc class compact body. It engine had a Twin Ram Air that generated 100PS.
This model underwent a full model change this year with the 750. It strengthened its power to handle the severe 600cc class race, by adopting a new engine and an inverted front fork.
It downsized the half cowl and modified the brake and swing arm to improve its maneuverability. The engine setting was also changed to focus on the low-mid speed.