Honda CBX1000 CBX 1000 Service Manual

HotCars' own retrospective doesn't undersell how genuinely radical this bike's arrival felt in 1978: "enter the CBX1000; iconic, overengineered, and often regarded as the best-sounding production motorcycle in existence... equipped with six cylinders of Japanese goodness sure to get it noticed wherever it went. That complexity would ultimately bring about its downfall, though, while also turning it into a cult classic phenom further down the road." Motorcycle Classics' own account confirms Honda's genuine motivation: with the CB750's dominance long since eclipsed by the Kawasaki Z1 and other rivals, "Honda didn't need to dig too deeply to create the technology for the Honda CBX 1000" — drawing directly on the company's own six-cylinder Grand Prix racing heritage from the RC166.

Power comes from a 1,047cc air-cooled inline-six, DOHC with 24 valves, delivering a claimed 103-105 hp at 9,000 rpm and roughly 62-70.5 lb-ft (84-95 Nm) of torque at 6,500-7,500 rpm, fed by six 28mm Keihin carburetors with an accelerator pump, run through a 5-speed transmission with chain final drive. HotCars' own detailed history confirms the genuine performance milestone this delivered: "that made it the fastest production motorcycle in the world, at least until the Suzuki Katana came out," reaching a claimed top speed around 218-220 km/h (135-137 mph). BikeAdvice's own retrospective confirms the genuinely serious engineering challenges Honda had to solve fitting such a wide engine into a motorcycle frame: "because the engine was massive and wide, Honda engineers had to make various unconventional changes. The ignition equipment was positioned behind the cylinder block and there was a jackshaft that provided the drive to the alternator... there was even a special side frame for it."

HotCars' own account confirms a genuinely surprising engineering discovery from Honda's own development process: "interestingly, a similarly-sized but noticeably lighter four-cylinder engine Honda tested at the time only made 5 hp less" than the six — meaning the CBX's genuine appeal was never really about outright performance efficiency, but rather the character and sound Honda's own engineers fell in love with. HotCars' own coverage confirms exactly why this engine earned its legendary reputation: "some have compared it to old-school Formula 1 car exhaust," and Motorcycle Classics' own account confirms the engine's genuinely remarkable smoothness — a detail HotCars separately notes let owners "balance a coin on it sideways at idle and lower revs," a real testament to the inline-six's inherent primary and secondary balance.

Autoevolution's own coverage confirms a genuine mid-cycle repositioning within this range: "in 1982, the Japanese motorcycle manufacturer repositioned the CBX into the sport touring section with the CBX-B model that packed a detuned engine to 98 hp and the addition of a Pro-Link monoshock absorber on the rear, a 39mm air-adjustable front fork, a stronger frame, and a fairing with optional panniers" — MotorBiscuit's own account confirms this transformation: "the Honda CBX 1000 Super Sport came with an extensive wind fairing, hard-sided saddlebags, and an adjustable rear mono-shock," a genuine shift from the original standard-styled naked six to a dedicated touring machine in its final production year. The 1978 launch model ran an air-assisted front fork with 160mm of travel and dual rear shocks with 100mm of travel, braking through dual 276mm front discs and a single 296mm rear disc — genuinely conventional chassis hardware built specifically to handle the weight and character of that extraordinary six-cylinder engine at the heart of the whole machine, weighing a substantial 250kg dry.

This factory service manual covers the procedures, torque specs, and diagrams needed to keep a 1978-1982 CBX1000's six-cylinder engine and driveline running the way it was built to.