XT125X

2009 Yamaha XT125X Technical Analysis & Specification Breakdown

Built around Yamaha's super motard motorcycle platform, the 2009 Yamaha XT125X utilizes a 124 cc (7.6 cu in) air-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 9.8 HP (7.1 kW) at 10,000 rpm while maximum torque reaches 10.1 Nm (7.4 lb-ft) at 5,500 rpm, transferring power to the rear wheel through a 5-speed gearbox. With a specific output of 79 HP per liter and a 4,500 rpm working window between peak torque (5,500 rpm) and peak power (10,000 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.

On the scales, the XT125X measures 120 kg (265 lbs) wet (curb), translating to a power-to-weight ratio of 0.08 HP/kg (12.24 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 1,335 mm (52.6 in) wheelbase engineered for quick, flickable steering geometry. The 9-liter (2.4 US gal) fuel tank supports practical everyday commuting and weekend road stints.

Within MotoLibrary's Yamaha archive, this model family spans 2 indexed model years from 2008 to 2009, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.