14 August. Friday 2026
Hercules K 125 Military - 1981 Specifications and Reviews
The 1981 Hercules K 125 Military is a lightweight two-stroke designed for budget-conscious and novice riders seeking reliable, economical transportation. Its modest 12.5 horsepower and 94 km/h top speed prioritize fuel efficiency and ease of handling over performance. This model is best known for its rugged simplicity and suitability for military and civilian utility applications.
General information | |
| Category | Unspecified category |
| Year | 1981 |
| Model | Hercules K 125 Military |
| | |
Engine and Transmission Specifications | |
| Transmission type,final drive | Chain |
| Gearbox | 5-speed |
| Cooling system | Air |
| Fuel control | Port control |
| Bore x stroke | 54.0 x 54.0 mm (2.1 x 2.1 inches) |
| Compression | 9.0:1 |
| Top speed | 94.0 km/h (58.4 mph) |
| Power | 12.50 |
| Engine type | Single cylinder, two-stroke |
| Capacity: | 124.00 ccm (7.57 cubic inches) |
Brakes, suspension, Frame and wheels | |
| Rear brakes | Expanding brake |
| Front brakes | Expanding brake |
| Rear tyre dimensions | 3.50-18 |
| Front tyre dimensions | 3.25-18 |
| | |
Physical measures and capacities | |
| Fuel capacity | 15.00 litres (3.96 gallons) |
| Weight incl. oil, gas, etc | 135.0 kg (297.6 pounds) |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
Performance Profile & Rider Fit
12.5 hp
Peak Power
58.4 mph
Top Speed
Best For
Track5%
City40%
Cornering25%
Daily Riding30%
Touring15%
Passenger10%
Rider Profile
| Best For | This is a simple, low-powered machine well suited to beginners or riders comfortable with basic, no-frills motorcycles. |
| Purpose | Built as a military utility bike, it prioritizes light weight, simplicity, and mechanical robustness over speed or comfort. |
| Rider Fit | Its light 130 kg weight and low seat dynamics make it easy to manage and maneuver for riders of most sizes and strengths. |
| Character | A rugged, no-nonsense two-stroke single with modest performance, drum brakes, and utilitarian military-spec construction. |
| Not Ideal For | This is not the bike for riders wanting speed, highway touring capability, or modern comfort and braking performance. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
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