Hanwei 300cc Water-cooled Tricycle Motorcycle Engine

Hanwei 300cc Water-cooled Tricycle Engine(also branded as Zongshen Hanwei)is a high-power,heavy-duty single-cylinder four-stroke powerplant,purpose-built for heavy-load cargo tricycles.It delivers superior low-end torque,stable high-temperature performance,and exceptional durability,making it the top choice for heavy freight,mountain,and long-distance commercial transport.

Core Specifications

Engine Type:Single-cylinder,4-stroke,OHV,water-cooled,inclined cylinder,down camshaft

Displacement:275cc(300cc nominal)

Bore&Stroke:74mm×64mm

Compression Ratio:10.4:1

Max.Power:12.5kW/6500rpm(16.8HP)

Max.Torque:21.0N·m/4500rpm

Ignition:DC-CDI(Capacitor Discharge Ignition)

Starting System:Electric start+kick start(dual backup)

Transmission:5-speed manual+reverse gear(tricycle-specific)

Lubrication:Pressure&splash hybrid

Cooling System:Water-cooled with radiator&thermostat

Oil Capacity:1.5L

Net Weight:36kg

Dimensions(L×W×H):341×359×454mm

Fuel Supply:Carburetor(EFI optional)

Fuel Consumption:≤354g/kW·h

Emission Standard:Euro IV/National IV compliant

Key Features&Advantages

Efficient Water-cooling System

Closed-loop water cooling with large-volume radiator and thermostat maintains optimal operating temperature,ensuring stable power output under continuous heavy loads and high ambient temperatures.Eliminates overheating issues common in air-cooled engines during prolonged heavy use.

Superior Low-RPM Torque

Tuned for peak torque at 4500rpm,providing immense pulling power,excellent hill-climbing ability,and stable performance when fully loaded—ideal for heavy cargo tricycles operating in mountainous or rough terrain.

Reinforced Heavy-duty Construction

Forged crankshaft,high-strength connecting rod,and hardened valves ensure exceptional reliability.Enlarged oil passages and high-efficiency oil pump reduce wear under extreme conditions,extending service life.

Built-in Balance Shaft

Integrated balance shaft effectively reduces engine vibration,enhancing ride comfort and reducing stress on the tricycle chassis and transmission system.

Tricycle-optimized Design

Features dedicated reverse gear and reinforced mounting points.High-strength gears and bearings are engineered to handle the high stresses of heavy-duty hauling and frequent starting/stopping.

Reliable&Economical

Efficient combustion minimizes fuel consumption.The robust design reduces maintenance frequency,while Zongshen's global service network ensures easy parts availability and support.