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Minibike, cross · 1982

ST70C

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MotoLibrary Score
34 /100 Commuter
Power/Weight
0.08 hp/kg
Top Speed
65 km/h
Engine
72 ccm

1982 Honda ST70C Technical Analysis & Specification Breakdown

Built around Honda's minibike, cross motorcycle platform, the 1982 Honda ST70C relies on a 72 cc (4.4 cu in) air-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 5.4 HP (3.9 kW), transferring power to the rear wheel through a 3-speed gearbox and chain final drive. With a specific output of 75 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 ST70C measures 69 kg (152 lbs) dry, translating to a power-to-weight ratio of 0.08 HP/kg (12.78 kg per horsepower). The 2.5-liter (0.7 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 65 km/h (40 mph).

Specific Output
75 HP/L
Power-to-Weight
0.08 HP/kg (12.78 kg/HP)
Engine
Displacement 72.0 ccm (4.39 cubic inches)
Engine Type Single cylinder, four-stroke
Engine Details Single cylinder, four-stroke
Power 5.4 HP (3.9 kW))
Compression 8.8:1
Bore x Stroke 47.0 x 41.4 mm (1.9 x 1.6 inches)
Valves/Cylinder 2
Fuel System Carburettor
Fuel Control Overhead Cams (OHC)
Cooling Air
Transmission
Gearbox 3-speed
Final Drive Chain (final drive)
Performance
Top Speed 65.0 km/h (40.4 mph)
Chassis
Rake 25.0°
Trail 58 mm (2.3 inches)
Front Suspension Oil damper
Rear Suspension Oil dampers
Wheels & Brakes
Front Tyre 3.50-10´
Rear Tyre 3.50-10´
Front Brakes Expanding brake (drum brake)
Rear Brakes Expanding brake (drum brake)
Dimensions & Weight
Dry Weight 69.0 kg (152.1 pounds)
Power/Weight 0.0777 HP/kg
Overall Height 960 mm (37.8 inches)
Overall Length 1510 mm (59.4 inches)
Overall Width 570 mm (22.4 inches)
Fuel Capacity 2.50 litres (0.66 US gallons)
Other
Color Options Candy Saphire Blue PB-3C
More from Honda
Buying Checklist

Before You Compare This Bike

Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.

Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
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
Off-Road & Adventure
⚖️
Handling
Very lightweight — easy to handle
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