What category is the 1981 Honda CB 650 C (reduced Effect)?

The 1981 Honda CB 650 C (reduced Effect) has a Category of Naked bike.

What is the engine size of the 1981 Honda CB 650 C (reduced Effect)?

The 1981 Honda CB 650 C (reduced Effect) has a Capacity: of 627.00 ccm (38.26 cubic inches).

What type of engine does the 1981 Honda CB 650 C (reduced Effect) have?

The 1981 Honda CB 650 C (reduced Effect) has a Engine type of In-line four, four-stroke.

What is the engine power of the 1981 Honda CB 650 C (reduced Effect)?

The 1981 Honda CB 650 C (reduced Effect) has a Power of 50.00.

What is the top speed of the 1981 Honda CB 650 C (reduced Effect)?

The 1981 Honda CB 650 C (reduced Effect) has a Top speed of 175.0 km/h (108.7 mph).

Is the 1981 Honda CB 650 C (reduced Effect) air cooled or liquid cooled?

The 1981 Honda CB 650 C (reduced Effect) has a Cooling system of Air.

How many gears does the 1981 Honda CB 650 C (reduced Effect) have?

The 1981 Honda CB 650 C (reduced Effect) has a Gearbox of 5-speed.

How much does the 1981 Honda CB 650 C (reduced Effect) weigh?

The 1981 Honda CB 650 C (reduced Effect) has a Weight incl. oil, gas, etc of 220.0 kg (485.0 pounds).

Honda CB 650 C (reduced Effect) - 1981 Specifications and Reviews

Name: 1981 Honda CB 650 C (reduced Effect)
Brand: Honda

The 1981 Honda CB 650 C is an accessible middleweight naked bike designed for riders seeking manageable performance without excessive power. Its 627cc air-cooled inline-four engine delivers 50 horsepower with smooth, predictable characteristics ideal for commuting and casual riding. Known for its reliability and user-friendly handling, this model appeals to beginners and everyday riders valuing practicality over raw speed.

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1981

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General information
Category	Naked bike
Year	1981
Model	Honda CB 650 C (reduced effect)

Engine and Transmission Specifications
Transmission type,final drive	Chain
Gearbox	5-speed
Cooling system	Air
Fuel control	OHC
Valves per cylinder	2
Bore x stroke	59.8 x 55.8 mm (2.4 x 2.2 inches)
Compression	9.0:1
Top speed	175.0 km/h (108.7 mph)
Power	50.00
Engine type	In-line four, four-stroke
Capacity:	627.00 ccm (38.26 cubic inches)

Brakes, suspension, Frame and wheels
Rear brakes	Expanding brake
Front brakes	Dual disc
Rear tyre dimensions	130/90-16
Front tyre dimensions	3.50-19
Physical measures and capacities
Fuel capacity	14.00 litres (3.70 gallons)
Weight incl. oil, gas, etc	220.0 kg (485.0 pounds)
Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

50 hp

Peak Power

6.5s

0-60 mph

108.7 mph

Top Speed

Best For

Track25%

City60%

Cornering45%

Daily Riding60%

Touring45%

Passenger50%

Rider Profile

Best For	This detuned CB650 suits newer riders or those returning to biking who want manageable, predictable power delivery.
Purpose	It's built as an easygoing all-rounder for commuting and relaxed weekend rides rather than outright performance.
Rider Fit	At 220 kg with a modest seat height typical of early-80s UJMs, it's manageable for riders of average build and experience.
Character	A classic air-cooled four-cylinder with smooth, linear power delivery and understated, traditional naked-bike styling.
Not Ideal For	This is not the bike for riders chasing high speeds, aggressive cornering performance, or serious long-distance touring comfort.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.