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Naked bike · 1982

CB 400 N (reduced effect)

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MotoLibrary Score
43 /100 Commuter
Power
27 HP
Top Speed
137 km/h
Engine
395 ccm

1982 Honda CB 400 N (reduced effect) Technical Analysis & Specification Breakdown

Positioned in Honda's naked motorcycle lineup, the 1982 Honda CB 400 N (reduced effect) pairs a 395 cc (24.1 cu in) air-cooled twin, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 27 HP (19.7 kW) at 7,500 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 68.4 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.

On the scales, the CB 400 N (reduced effect) measures 185 kg (408 lbs) wet (curb), translating to a power-to-weight ratio of 0.15 HP/kg (6.85 kg per horsepower). The 14-liter (3.7 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 137 km/h (85 mph).

Within MotoLibrary's Honda archive, this model family spans 4 indexed model years from 1980 to 1983, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.

Specific Output
68.4 HP/L
Power-to-Weight
0.15 HP/kg (6.85 kg/HP)
Engine
Displacement 395.0 ccm (24.10 cubic inches)
Engine Type Twin, four-stroke
Engine Details Twin, four-stroke
Power 27.0 HP (19.7 kW)) @ 7500 RPM
Compression 9.3:1
Bore x Stroke 70.5 x 50.6 mm (2.8 x 2.0 inches)
Valves/Cylinder 3
Fuel Control Overhead Cams (OHC)
Cooling Air
Transmission
Gearbox 6-speed
Final Drive Chain (final drive)
Performance
Top Speed 137.0 km/h (85.1 mph)
Wheels & Brakes
Front Tyre 3.60-19
Rear Tyre 4.10-18
Front Brakes Dual disc
Rear Brakes Expanding brake
Dimensions & Weight
Weight incl. 185.0 kg (407.9 pounds)
Fuel Capacity 14.00 litres (3.70 US gallons)
More from Honda
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Power
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Transmission
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Rider Profile

Who Is This Bike For?

🟢
Beginner
A2 license compatible, manageable power.
🏍️
Best For
City & Weekend Rides
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