C 652 SM International

1999 Norton C 652 SM International Technical Analysis & Specification Breakdown

Engineered by Norton for the classic motorcycle segment, the 1999 Norton C 652 SM International utilizes a 652 cc (39.8 cu in) liquid-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 48 HP (35 kW) at 6,500 rpm while maximum torque reaches 57 Nm (42 lb-ft) at 5,200 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 1,300 rpm working window between peak torque (5,200 rpm) and peak power (6,500 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 C 652 SM International measures 171 kg (377 lbs) wet (curb), translating to a power-to-weight ratio of 0.28 HP/kg (3.56 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 1,380 mm (54.3 in) wheelbase engineered for quick, flickable steering geometry. The 20-liter (5.3 US gal) fuel tank paired with a rated consumption of 5.8 L/100 km provides an estimated theoretical range of roughly 345 km (214 miles) between fill-ups, while factory top speed is listed at 175 km/h (109 mph).