Cyclone RX4

2021 Zongshen Cyclone RX4 Technical Analysis & Specification Breakdown

Built around Zongshen's enduro - offroad motorcycle platform, the 2021 Zongshen Cyclone RX4 utilizes a 450.3 cc (27.5 cu in) liquid-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 40.2 HP (29.4 kW) at 8,000 rpm while maximum torque reaches 37 Nm (27.3 lb-ft) at 7,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 89.3 HP per liter and a 1,000 rpm working window between peak torque (7,000 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 Cyclone RX4 measures 204 kg (450 lbs) wet (curb), translating to a power-to-weight ratio of 0.2 HP/kg (5.07 kg per horsepower). Rider ergonomics and chassis geometry center around a 810 mm (31.9 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,425 mm (56.1 in) wheelbase engineered for balanced agility and highway composure. The 20-liter (5.3 US gal) fuel tank paired with a rated consumption of 3.6 L/100 km provides an estimated theoretical range of roughly 556 km (345 miles) between fill-ups, while factory top speed is listed at 160 km/h (99 mph).