GT650R

2012 ATK GT650R Technical Analysis & Specification Breakdown

At the heart of the 2012 ATK GT650R sport motorcycle, ATK pairs a 647 cc (39.5 cu in) liquid-cooled v2, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 79 HP (57.7 kW) at 9,250 rpm while maximum torque reaches 66.9 Nm (49.3 lb-ft) at 7,250 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 122.1 HP per liter and a 2,000 rpm working window between peak torque (7,250 rpm) and peak power (9,250 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 GT650R measures 215 kg (474 lbs) wet (curb), translating to a power-to-weight ratio of 0.37 HP/kg (2.72 kg per horsepower). Rider ergonomics and chassis geometry center around a 831 mm (32.7 in) seat height — resulting in a taller command-style riding posture suited to medium-to-tall inseams, combined with a 1,435 mm (56.5 in) wheelbase engineered for balanced agility and highway composure. The 17.03-liter (4.5 US gal) fuel tank supports practical everyday commuting and weekend road stints.

Within MotoLibrary's ATK archive, this model family spans 4 indexed model years from 2012 to 2016, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.