Zs174mn-5 Zongshen 300cc Engine Water-Cooled 4-Stroke Engine with Balance Shaft Nb300

Zs174mn-5 Zongshen 300cc Engine Water-Cooled 4-Stroke Engine with Balance Shaft Nb300. Water-Cooled 4-Stroke Engine: Zongshen NB300 engine with water cooling and 4-stroke principle for efficient performance. Built-in Balance Shaft: Effectively balances engine vibration in all directions for stable and low-noise operation. Dual-Pump Lubrication System: Provides independent lubrication to heat engine and transmission parts for increased reliability. Electric and Kick Start: Versatile starting methods including electric start and kick start for various conditions. High-Accuracy Silent Chain: Morse silent chain reduces engine noises and prolongs chain life significantly. Optimized Combustion System: Improved intake/exhaust design ensures complete combustion and greater power output. Needle Bearing Valve Arm: Reduces friction between camshaft and arm, lowering power loss and extending service life. Compact Engine Structure: Controlled dimensions and weight with a clutch cover designed for easy removal.