XT660R

2008 Yamaha XT660R Technical Analysis & Specification Breakdown

At the heart of the 2008 Yamaha XT660R super motard motorcycle, Yamaha relies on a 660 cc (40.3 cu in) liquid-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 47.3 HP (34.5 kW) at 8,500 rpm while maximum torque reaches 60 Nm (44.3 lb-ft) at 6,100 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 71.7 HP per liter and a 2,400 rpm working window between peak torque (6,100 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 XT660R measures 172 kg (379 lbs) dry, translating to a power-to-weight ratio of 0.28 HP/kg (3.64 kg per horsepower). Rider ergonomics and chassis geometry center around a 865 mm (34.1 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,505 mm (59.3 in) wheelbase engineered for balanced agility and highway composure. The 15-liter (4 US gal) fuel tank supports practical everyday commuting and weekend road stints.

Within MotoLibrary's Yamaha archive, this model family spans 7 indexed model years from 2008 to 2015, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.