Honda CB750 Hornet 2023-2025 Service Manual

Visordown's own review captures the genuine departure this bike represents from its inline-four ancestors: "gone is the inline four-cylinder engine of before, and in its place is a parallel-twin cylinder with a 270-degree crank and a 90.5hp power output that is within spitting distance of the original bike's peak figure." Honda's own global product page confirms the deliberate design continuity nonetheless: "adopted a new generation of street fighter styling while building keeping true to the Hornet series concept" — Ultimate Motorcycling's own coverage adding that Honda R&D Rome's design brief was "Sensual Dynamism," aiming for "a straightforward streetfighter design — just like the original, but we wanted much more aggressive angles and proportions," inspired by "the silhouette and sinuous muscularity of a cheetah at full speed."

Power comes from a 755cc liquid-cooled parallel-twin, Unicam with 8 valves and a genuine 270-degree crank, an 87mm x 63.5mm bore and stroke, and an 11:1 compression ratio, delivering a claimed 90-91 hp at 9,500 rpm and roughly 55 lb-ft (74 Nm) of torque at 7,000 rpm through a 6-speed manual gearbox. Bennetts' own detailed launch review confirms the deliberately high-revving character this bore/stroke ratio was engineered to deliver: "an overly oversquare 87mm bore and 63.5mm of stroke" that "suggest Honda have designed an engine predisposed to high revs" — a genuinely different personality from the torquier, longer-stroke twins most direct rivals run.

Ultimate Motorcycling's own detailed breakdown confirms a genuine acoustic engineering effort behind the exhaust: Visordown's own testing found "a trick twin-pipe design... the upper, larger exhaust outlet handles the bass, while the smaller, lower opening handles the mid-range and treble... and it's no accident the Hornet sounds so good, with Honda's engineers testing around 100 iterations of the system before landing on this design." Motorcycle.com's own coverage confirms genuine standard equipment across the launch specification: a 5-inch color TFT display with four display layouts, Honda Smartphone Voice Control working over Bluetooth with helmet headsets, a USB-C port, and self-canceling turn signals — Honda's own 2025 model-year spec sheet confirms four riding modes (Standard, Sport, Rain, and two rider-programmable User modes) alongside a Showa SFF-BP 41mm inverted fork (4.7 inches of travel) and a Pro-Link Showa single shock (5.1 inches of travel).

Bennetts' own review confirms the genuinely competitive pricing strategy behind this bike's UK launch: "£6999. Priced specifically to undercut its main rival, the Yamaha MT-07, which (at the time of writing) is available from £7,200, as well as the Kawasaki Z650 (£7349) though comes with radial calipers, colour TFT and Bluetooth" — real standard-equipment advantages against direct rivals at a lower price point. Braking uses Nissin four-piston calipers on dual 296mm front discs and a single-piston sliding caliper on a 240mm rear disc. Visordown's own testing notes a genuine ergonomic trade-off worth knowing: "overall the road manners of the bike are okay, although you do get the impression that Honda has aimed more at sporty handling than rider comfort," with non-adjustable front suspension and only manual preload adjustment at the rear. TopSpeed's own coverage confirms this launch represents Honda's deliberate revival of "its out-of-production 'Hornet' platform" — an entirely new frame, bodywork, engine, and suspension built specifically to compete in the 750-class middleweight naked segment against the MT-07, Z650, and SV650. This 2023 launch specification carried forward largely unchanged through the 2025 model year, with Bennetts' own coverage confirming only new colorway options across that span.

This factory service manual covers the procedures, torque specs, and diagrams needed to keep a 2023-2025 CB750 Hornet running the way it was built to.