M10

1961 Junak M10 Technical Analysis & Specification Breakdown

Engineered by Junak for the classic motorcycle segment, the 1961 Junak M10 relies on a 349 cc (21.3 cu in) oil & air-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 19 HP (13.9 kW) at 6,000 rpm while maximum torque reaches 28 Nm (20.7 lb-ft) at 3,800 rpm, transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 54.4 HP per liter and a 2,200 rpm working window between peak torque (3,800 rpm) and peak power (6,000 rpm), the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.

On the scales, the M10 measures 190 kg (419 lbs) wet (curb), translating to a power-to-weight ratio of 0.1 HP/kg (10 kg per horsepower). The 17-liter (4.5 US gal) fuel tank paired with a rated consumption of 3 L/100 km provides an estimated theoretical range of roughly 567 km (352 miles) between fill-ups, while factory top speed is listed at 120 km/h (75 mph).