MotoLibrary MotoLibrary
← Hercules
1973

K 125 T

User Rating: /5 · No user ratings yet ✓ Your rating was saved
MotoLibrary Score
38 /100 Commuter
Power
17 HP
Top Speed
119 km/h
Engine
124 ccm

1973 Hercules K 125 T Technical Analysis & Specification Breakdown

Engineered by Hercules for the motorcycle segment, the 1973 Hercules K 125 T relies on a 124 cc (7.6 cu in) air-cooled single cylinder, two-stroke powerplant. In factory specification, peak output is rated at 17 HP (12.4 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 137.1 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 K 125 T measures 115 kg (254 lbs) wet (curb), translating to a power-to-weight ratio of 0.15 HP/kg (6.76 kg per horsepower). The 10.5-liter (2.8 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 119 km/h (74 mph).

Specific Output
137.1 HP/L
Power-to-Weight
0.15 HP/kg (6.76 kg/HP)
Engine
Displacement 124.0 ccm (7.57 cubic inches)
Engine Type Single cylinder, two-stroke
Engine Details Single cylinder, two-stroke
Power 17.0 HP (12.4 kW)) @ 7500 RPM
Compression 11.8:1
Bore x Stroke 54.0 x 54.0 mm (2.1 x 2.1 inches)
Fuel Control Port control
Cooling Air
Transmission
Gearbox 6-speed
Final Drive Chain (final drive)
Performance
Top Speed 119.0 km/h (73.9 mph)
Wheels & Brakes
Front Tyre 2.75-17
Rear Tyre 3.00-17
Front Brakes Expanding brake
Rear Brakes Expanding brake
Dimensions & Weight
Weight incl. 115.0 kg (253.5 pounds)
Fuel Capacity 10.50 litres (2.77 US gallons)
More from Hercules
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.
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.
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
General Purpose
Estimate

Ownership Cost Calculator

⛽ Fuel
per year
🔧 Maintenance
per year
🛡️ Insurance
per year
TOTAL

* Estimates only. Actual costs vary by country, riding habits, insurance provider and maintenance schedule.

MotoLibrary
🏠 Home 🔍 All Bikes 📂 Categories ⚖️ Compare 🎛️ Advanced Filter 🎯 Bike Finder 🎬 Videos 📰 Blog 📖 Glossary ℹ️ About

🍪 We use cookies for analytics & ads. Cookie Policy