AX4

2020 Suzuki AX4 Technical Analysis & Specification Breakdown

Engineered by Suzuki for the naked motorcycle segment, the 2020 Suzuki AX4 pairs a 149.5 cc (9.1 cu in) air-cooled single cylinder, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 11 HP (8 kW) at 8,000 rpm while maximum torque reaches 11.5 Nm (8.5 lb-ft) at 5,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 73.6 HP per liter and a 3,000 rpm working window between peak torque (5,000 rpm) and peak power (8,000 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 AX4 measures 133 kg (293 lbs) wet (curb), translating to a power-to-weight ratio of 0.08 HP/kg (12.09 kg per horsepower). Rider ergonomics and chassis geometry center around a 765 mm (30.1 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,310 mm (51.6 in) wheelbase engineered for quick, flickable steering geometry. The 12.5-liter (3.3 US gal) fuel tank supports practical everyday commuting and weekend road stints.

Within MotoLibrary's Suzuki archive, this model family spans 3 indexed model years from 2016 to 2020, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.