125 SX

2009 MZ 125 SX Technical Analysis & Specification Breakdown

Engineered by MZ for the enduro - offroad motorcycle segment, the 2009 MZ 125 SX features a 124 cc (7.6 cu in) single cylinder, four-stroke configuration. In factory specification, peak output is rated at 14.8 HP (10.8 kW) at 9,000 rpm while maximum torque reaches 11.7 Nm (8.6 lb-ft) at 8,500 rpm, transferring power to the rear wheel through chain final drive. With a specific output of 119.4 HP per liter and a 500 rpm working window between peak torque (8,500 rpm) and peak power (9,000 rpm), the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.

On the scales, the 125 SX measures 127.5 kg (281 lbs) dry, translating to a power-to-weight ratio of 0.12 HP/kg (8.61 kg per horsepower). Rider ergonomics and chassis geometry center around a 860 mm (33.9 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,440 mm (56.7 in) wheelbase engineered for balanced agility and highway composure. The 12.5-liter (3.3 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 110 km/h (68 mph).

Within MotoLibrary's MZ archive, this model family spans 2 indexed model years from 2006 to 2009, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.