Planeta 4

1984 IZH Planeta 4 Technical Analysis & Specification Breakdown

Built around IZH's classic motorcycle platform, the 1984 IZH Planeta 4 relies on a 350 cc (21.4 cu in) air-cooled single cylinder, two-stroke powerplant. In factory specification, peak output is rated at 20 HP (14.6 kW) at 4,800 rpm while maximum torque reaches 27.5 Nm (20.3 lb-ft) at 4,700 rpm, transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 57.1 HP per liter and a 100 rpm working window between peak torque (4,700 rpm) and peak power (4,800 rpm), the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.

On the scales, the Planeta 4 measures 155 kg (342 lbs) dry, translating to a power-to-weight ratio of 0.13 HP/kg (7.75 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,450 mm (57.1 in) wheelbase engineered for balanced agility and highway composure. The 17-liter (4.5 US gal) fuel tank paired with a rated consumption of 5.5 L/100 km provides an estimated theoretical range of roughly 309 km (192 miles) between fill-ups, while factory top speed is listed at 120 km/h (75 mph).