Key performance
Technical specifications
- Power
- 12.6 ch (9.2 kW) → 12.6 ch @ 8200 tr/min (9.2 kW)
- Torque
- 9.2 Nm → 9.2 Nm @ 7000 tr/min
- Compression ratio
- 9.0:1 → —
- Bore × stroke
- 56.5 x 49.5 mm (2.2 x 1.9 inches) → —
- Fuel system
- — → Carburettor
- Starter
- Electric & kick → Electric
- Final drive
- — → Chain (final drive)
- Rear suspension
- Central unit → Hydraulic telescopic
- Front wheel travel
- 170 mm (6.7 inches) → 150 mm (5.9 inches)
- Rear wheel travel
- 150 mm (5.9 inches) → 70 mm (2.8 inches)
- Front brakes
- Single disc → Single disc. Hydraulic
- Rear brakes
- Single disc → Expanding brake (drum brake)
- Front tyre
- 2.75-19 → 3.00-18
- Seat height
- 830.00 mm → 820.00 mm
- Wheelbase
- 1350.00 mm → 1370.00 mm
- Fuel capacity
- 6.50 L → 17.00 L
- Weight
- — → 131.00 kg
- Dry weight
- 99.00 kg → 115.00 kg
Engine
- Displacement
- 124 cc
- Power
- 12.6 ch @ 8200 tr/min (9.2 kW)
- Torque
- 9.2 Nm @ 7000 tr/min
- Engine type
- Single cylinder, four-stroke
- Cooling
- Air
- Fuel system
- Carburettor
- Valve timing
- Single Overhead Cams (SOHC)
- Starter
- Electric
Chassis
- Frame
- Steel
- Gearbox
- 5-speed
- Final drive
- Chain (final drive)
- Front suspension
- Telescopic forks
- Rear suspension
- Hydraulic telescopic
- Front wheel travel
- 150 mm (5.9 inches)
- Rear wheel travel
- 70 mm (2.8 inches)
Brakes
- Front brakes
- Single disc. Hydraulic
- Rear brakes
- Expanding brake (drum brake)
- Front tyre
- 3.00-18
- Rear tyre
- 3.50-16
Dimensions
- Seat height
- 820.00 mm
- Wheelbase
- 1370.00 mm
- Fuel capacity
- 17.00 L
- Weight
- 131.00 kg
- Dry weight
- 115.00 kg
Overview
In 2014, releasing a 125cc carbureted sportbike with a rear drum brake was less of a commercial gamble than an act of resistance. The CZ 125 embraces this status with disarming sincerity. Its air-cooled 124 cm3 four-stroke single cylinder doesn’t promise the moon: 12.6 horsepower at 8200 rpm and 9.2 Nm of torque. These figures evoke another era, one where you learned to modulate the throttle before claiming to be a rider. The steel frame, the 3.00-18 and 3.50-16 chambered tires, the final chain transmission on five gears, everything here breathes simple and robust mechanics.

On the road, this approach finds its justification. With 131 kilograms fully fueled and a seat height of 82 cm, the machine is accessible and extremely maneuverable. The telescopic fork and hydraulic shock absorber provide basic but effective work. The front hydraulic disc brake and rear drum brake are sufficient to control enthusiasm, especially since the top speed peaks around 95 km/h. It’s not a motorcycle for burning down straightaways, but for rediscovering the pleasure of corners taken with gusto, where the low weight and wheelbase of 1370 mm inspire immediate confidence. The 17-liter tank promises considerable range for the segment, highlighting a vocation for use rather than pure performance.
Compared to the Yamaha YZF-R125 or the Aprilia RS4 125 of the time, crammed with electronics and displaying aggressive designs, the CZ 125 appears naive. It doesn’t seek to imitate superbikes, it simply offers an elementary riding experience. The carburetor requires a bit of know-how when starting cold, the tachometer is a suggestion more than a necessity, and the sound of the single cylinder is a discreet purr. It’s a two-wheeled pedagogy, a lesson in applied mechanics that recalls that pleasure can be born of simplicity and lightness.
This atypical sportbike is therefore aimed at the authentic beginner, the one who wants to understand their machine before taming it, or the nostalgic rider seeking a raw sensation. It is the anti-digital camera in a world of smartphones, a machine that doesn’t cheat on its capabilities. It won’t make you a champion, but it might well teach you to love the very essence of motorcycling, where every horsepower counts and every corner is earned. In a market saturated with high-tech clones, the CZ 125 remains, stubbornly, a motorcycle.
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