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NC250
Key Product Attributes
Performance and characteristic：
Optimized the design of intake and exhaust and combustion system,make the engine more powerful.
The unique structural design of the engine, the engine structure is more compact, the engine total height is smaller.
The weight of engine is lighter, total weight is 30kg
The design of Sub-cavity lubrication system to ensure adequate lubrication of the engine moving parts and improve engine reliability.
New Design of the clutch cover, clutch removal easier
Performance and Characteristics
Compact engine structure
According to analysis on many limited elements, the engine weight shall be minimized on the premise of ensuring the strength of parts and components. Compact structure design effectively controls the overall dimensions of the engine; the clutch cover is designed to make it easier to remove the clutch, and the start-up shaft is upward, which is more suitable for mounting on the off-road.
Gas passage and combustion system design
Intake and exhaust and combustion system design is optimized, greatly increasing engine gas charging efficiency, improving fuel and gas mixing condition, promoting combustion, and increasing engine power output.
Separate chamber lubrication system
Two oil pumps are provided for the engine to supply lubricating oil for warmed up part and driving part respectively to ensure each moving component of the engine is fully lubricated so as to increase engine reliability.
Valve rocker arm of needle bearing
Valve rocker arm of needle bearing improves friction condition between camshaft and rocker arm, reduces power loss and extends service life;
Special spraying hole design
The box is provided with special spraying hole for spraying oil to cool down and lubricate the cylinder piston, thus effectively controlling piston temperature and improving engine operation environment and extending engine service life.
High-accuracy Morse silent chain
High-accuracy Morse silent chain reduces noise generated from engine operation and extending chain service life;
Built-in balance shaft device
Built-in balance shaft device effectively balances engine vibration in all directions and makes the engine operate stably with low noise;
Technical Parameters
Engine model : ZS177MM
Engine name : NC250
Engine type : Single cylinder,4-stroke,4-valve，water-cooled, camshaft upward, with balance shaft.
Displacement (ml) : 249.6
Dimension (mm×mm×mm) : 382×316×415
Net weight(kg) : 31
Max. power (kw/r/min) : 19/9000
Max. torque (N.m/r/min) : 22.5/7000
Compression ratio : 11.6：1
Bore and stroke (mm×mm) : 77×53.6
Ignition method : DC-CDI
Lubrication method : Pressure and splash
Min. fuel consumption (g/Kw.h): ≤354
Starting method : Electric/kick
Clutch method : Manual wet multi-plate
Gearshift method : Constant mesh, two stage transmission ,6-speed gearshift
Pengendara Motor China Sejak 2005 
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