Motocross Bikes
1980Hercules K 125 Military
18 fields on record
The Hercules K 125 Military is a lightweight 1980 cross-country motorcycle built for practical off-road riding and military applications. Its 124cc two-stroke single-cylinder engine delivers modest power suited to novice riders and utility purposes rather than competitive performance. Known for its simple, rugged construction and reliable chain-drive transmission, it excels in rough terrain and everyday adventure riding.
- Capacity
- 124.0 ccm
- Engine
- Single, two-stroke
- Gearbox
- 5-speed
- Wet weight
- 135.0 kg
- Seat height
- Not on record
Know it? Add it → - Power
- 12.5 HP (9.2 kW) @ 7000 RPM
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built as a military utility bike, it prioritizes light weight, simplicity, and mechanical robustness over speed or comfort.
- Built for
- 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.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Engine
- Capacity
- 124.0 ccm
- Power
- 12.5 HP (9.2 kW) @ 7000 RPM
- Engine type
- Single, two-stroke
- Power/weight ratio
- 0.0926 HP/kg (wet)
- Bore x stroke
- 54.0 x 54.0 mm
- Compression
- 9.0:1
- Cooling system
- Air
Transmission
- Gearbox
- 5-speed
- Transmission type
- Manual
- Final drive
- Chain
Performance
- Top speed
- 94.0 km/h (58.4 mph)
Dimensions & weight
Brakes & wheels
- Front brakes
- Expanding brake
- Rear brakes
- Expanding brake
- Front tyre
- 3.25-18
- Rear tyre
- 3.50-18
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 1980 | 1983 | 1985 | 1988 | 1990 |
|---|---|---|---|---|---|
| Capacity | 124 cc | 124 cc | 124 cc | 124 cc | 124 cc |
| Fuel capacity | 15 L | 15 L | 15 L | 15 L | 15 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Hercules K 125 Military?
The 1980 Hercules K 125 Military has a Capacity of 124.0 ccm (7.57 cubic inches).
What engine power does the Hercules K 125 Military have?
The 1980 Hercules K 125 Military has a Power of 12.5 HP (9.2 kW) @ 7000 RPM.
How many gears does the Hercules K 125 Military have?
The 1980 Hercules K 125 Military has a Gearbox of 5-speed.
How much does the Hercules K 125 Military weigh?
The 1980 Hercules K 125 Military has a Wet weight of 135.0 kg (297.6 pounds).
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