Bonneville SE

2012 Triumph Bonneville SE Technical Analysis & Specification Breakdown

Engineered by Triumph for the classic motorcycle segment, the 2012 Triumph Bonneville SE relies on a 865 cc (52.8 cu in) air-cooled twin, four-stroke powerplant. In factory specification, peak output is rated at 66 HP (48.2 kW) at 7,500 rpm while maximum torque reaches 67.8 Nm (50 lb-ft) at 5,800 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 76.3 HP per liter and a 1,700 rpm working window between peak torque (5,800 rpm) and peak power (7,500 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 Bonneville SE measures 225 kg (496 lbs) wet (curb), translating to a power-to-weight ratio of 0.29 HP/kg (3.41 kg per horsepower). Rider ergonomics and chassis geometry center around a 739 mm (29.1 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,488 mm (58.6 in) wheelbase engineered for balanced agility and highway composure. The 16-liter (4.2 US gal) fuel tank paired with a rated consumption of 4.7 L/100 km provides an estimated theoretical range of roughly 340 km (211 miles) between fill-ups.

Within MotoLibrary's Triumph archive, this model family spans 4 indexed model years from 2009 to 2012, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.