XT125X

2008 Yamaha XT125X Technical Analysis & Specification Breakdown

Positioned in Yamaha's super motard motorcycle lineup, the 2008 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 8,500 rpm while maximum torque reaches 9.5 Nm (7 lb-ft) at 2,100 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 79 HP per liter and a 6,400 rpm working window between peak torque (2,100 rpm) and peak power (8,500 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 106 kg (234 lbs) dry, translating to a power-to-weight ratio of 0.09 HP/kg (10.82 kg per horsepower). Rider ergonomics and chassis geometry center around a 830 mm (32.7 in) seat height — resulting in a taller command-style riding posture suited to medium-to-tall inseams, combined with a 1,335 mm (52.6 in) wheelbase engineered for quick, flickable steering geometry. The 10-liter (2.6 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.