Naked Motorcycles
1981Honda CB 750 K
19 fields on record
The 1981 Honda CB 750 K is an air-cooled sport-touring middleweight that appeals to riders seeking reliable, versatile performance. Its legendary inline-four engine delivers smooth 77 horsepower with excellent fuel efficiency, making it ideal for both commuting and weekend rides. The CB 750 K is best known for pioneering the modern motorcycle category and maintaining Honda's reputation for dependable, accessible performance.
- Capacity
- 748.0 ccm
- Engine
- In-line four
- Gearbox
- 5-speed
- Wet weight
- 256.0 kg
- Seat height
- Not on record
Know it? Add it → - Power
- 77.0 HP (56.6 kW) @ 9000 RPM
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- This is a classic all-rounder from the early 80s, built for confident street riding, weekend cruising, and light touring rather than outright performance or track use.
- Built for
- A smooth, torquey inline-four with classic UJM (Universal Japanese Motorcycle) charm, rewarding relaxed, steady-paced riding over aggressive cornering or high-speed antics.
- Not ideal for
- Not a good fit for off-road adventures, novice riders intimidated by weight, or anyone expecting modern sportbike agility or braking performance.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Engine
- Capacity
- 748.0 ccm
- Power
- 77.0 HP (56.6 kW) @ 9000 RPM
- Engine type
- In-line four
- Power/weight ratio
- 0.3008 HP/kg (wet)
- Bore x stroke
- 62.0 x 62.0 mm
- Compression
- 9.0:1
- Cooling system
- Air
- Valves per cylinder
- 4
- Torque
- Not on record - add it
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
Performance
- Top speed
- 200.0 km/h (124.3 mph)
Dimensions & weight
Brakes & wheels
- Front brakes
- Dual disc
- Rear brakes
- Expanding brake
- Front tyre
- 3.25-19
- Rear tyre
- 4.00-18
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 1980 | 1981 | 1982 |
|---|---|---|---|
| Capacity | 748 cc | 748 cc | 748 cc |
| Fuel capacity | 20 L | 20 L | 20 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Honda CB 750 K?
The 1981 Honda CB 750 K has a Capacity of 748.0 ccm (45.65 cubic inches).
What engine power does the Honda CB 750 K have?
The 1981 Honda CB 750 K has a Power of 77.0 HP (56.6 kW) @ 9000 RPM.
How many gears does the Honda CB 750 K have?
The 1981 Honda CB 750 K has a Gearbox of 5-speed.
How much does the Honda CB 750 K weigh?
The 1981 Honda CB 750 K has a Wet weight of 256.0 kg (564.4 pounds).
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