Motocross Bikes
1983Hercules K 125 Military
18 fields on record
The 1983 Hercules K 125 Military is a lightweight, air-cooled single-cylinder motorcycle designed for practical, economical commuting and utility riding. With its modest 12.5 hp output and 135 kg weight, it appeals to budget-conscious riders and beginners seeking reliable, fuel-efficient transportation. Best known for its no-nonsense, durable construction and straightforward five-speed drivetrain.
- 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 1983 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 1983 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 1983 Hercules K 125 Military has a Gearbox of 5-speed.
How much does the Hercules K 125 Military weigh?
The 1983 Hercules K 125 Military has a Wet weight of 135.0 kg (297.6 pounds).
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