Single Cylinder SP 390/420

The SP 390/420 model features a powerful single-cylinder, 4-stroke engine with air-forced and overhead valve (OHV) technology. With a displacement of 389 cc and a bore x stroke ratio of 88 x 64, this engine is designed to deliver optimal performance. The air filter is a semi-dry, oil bath, foam filter that effectively captures debris and ensures clean air intake. The starting system is recoil-start, providing ease of use and convenience. The lubrication system is splash-based, ensuring proper oil distribution and reducing friction within the engine. With an oil capacity of 1.1 L and a fuel tank capacity of 6.5 L, this model offers sufficient reserves for extended operation. Despite its impressive power, the net weight of the engine is only 32 kg, making it relatively lightweight and portable. Operating at 3600 rpm, this engine delivers a rated output of 11 HP or 8.2 kW, making it suitable for a variety of applications.