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Sport · 1973

CB 350

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MotoLibrary Score
45 /100 Balanced
Power/Weight
0.24 hp/kg
Top Speed
165 km/h
Torque
25 Nm
Engine
325 ccm

1973 Honda CB 350 Technical Analysis & Specification Breakdown

Built around Honda's sport motorcycle platform, the 1973 Honda CB 350 utilizes a 325 cc (19.8 cu in) air-cooled twin, four-stroke layout. In factory specification, peak output is rated at 36 HP (26.3 kW) at 10,500 rpm while maximum torque reaches 25 Nm (18.4 lb-ft), transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 110.8 HP per liter, the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.

On the scales, the CB 350 measures 170 kg (375 lbs) wet (curb), translating to a power-to-weight ratio of 0.21 HP/kg (4.72 kg per horsepower). Rider ergonomics and chassis geometry center around a 790 mm (31.1 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,300 mm (51.2 in) wheelbase engineered for quick, flickable steering geometry. The 10-liter (2.6 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 165 km/h (103 mph).

Within MotoLibrary's Honda archive, this model family spans 4 indexed model years from 1970 to 1973, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.

Specific Output
110.8 HP/L
Power-to-Weight
0.21 HP/kg (4.72 kg/HP)
Standover Height
790 mm (31.1 in)
Engine
Displacement 325.0 ccm (19.83 cubic inches)
Engine Type Twin, four-stroke
Engine Details Twin, four-stroke
Power 36.0 HP (26.3 kW)) @ 10500 RPM
Torque 25.0 Nm (2.5 kgf-m or 18.4 ft.lbs)
Compression 9.5:1
Bore x Stroke 64.0 x 50.6 mm (2.5 x 2.0 inches)
Valves/Cylinder 2
Fuel System Carburettor
Fuel Control Overhead Cams (OHC)
Ignition Coil and breaker points
Cooling Air
Transmission
Gearbox 5-speed
Final Drive Chain (final drive)
Performance
Top Speed 165.0 km/h (102.5 mph)
Chassis
Front Suspension Telescoping fork
Rear Suspension Swinging arm
Wheelbase 1300 mm (51.2 inches)
Wheels & Brakes
Front Tyre 3.00-18
Rear Tyre 3.50-18
Front Brakes Single disc
Rear Brakes Expanding brake
Dimensions & Weight
Dry Weight 149.0 kg (328.5 pounds)
Weight incl. 170.0 kg (374.8 pounds)
Power/Weight 0.2416 HP/kg
Seat Height 790 mm (31.1 inches) If adjustable, lowest setting.
Fuel Capacity 10.00 litres (2.64 US gallons)
Other
Starter Kick
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Power
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Torque
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Seat Height
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Weight
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Fuel Capacity
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Brakes
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Suspension
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Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
Rider Profile

Who Is This Bike For?

🟢
Beginner
A2 license compatible, manageable power.
🏁
Best For
Sport & Track
📏
Seat Height
79 cm / 31.1 in
⚖️
Handling
Manageable weight for most riders
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