Motorcycle engine and engine accessories (CG250 water-cooled）

167MM (CG250 water-cooled)
Type: Single-cylinder, water-cooled, four-stroke, hand-clutched
Bore x stroke: 67 x 65 mm                            
Total displacement: 229.2mL
Compression ratio: 9.5:1
Max. power/responding speed: 11.8 kw/7000 (1±5%) r/min
Max. torque/responding speed: 18 N.m/5500 (1±5%) r/min
Min. no-load stabilised speed (idle): 1500 r/min  
Minimum fuel consumption rate: ≤354 g/(kW-h)
Limit values of exhaust pollutants measured by idling method: CO≤3.8%, HC≤800ppm (idling method/Euro I)
CO≤5.5g/km, THC≤1.2g/km, NOx≤0.3g/km(I/II)
Ignition method and spark plug type: CDI; D8TC
Ignition advance angle: 9°±1.5°/1500r/min  
BTDC (before upper stop)/BBDC (before lower stop): 10°/40°
Inlet/exhaust valve closed.ABDC(after lower stop)/ATDC(after upper stop):40°/10°
Valve clearance (when cold): 0.02~0.04mm
Clutch type: Wet multi-plate
Transmission type: Left foot shift, 5-speed normal engagement type
Primary reduction ratio: 4.055   
Gear ratio :
i1/i2/i3/i4/i5 2.909/1.867/1.389/1.150/0.955                           
Fuel grade: RQ-90 or above
Carburettor type: PZ30
Oil grade: 15W/40-SF four-stroke petrol engine oil
Total oil capacity: 1100ml
Spark plug gap: 0.6mm~0.7mm
Lubrication method and lubrication pump type: Pressure splash lubrication, internal and external rotor type
Air filter type: foam cartridge type
Engine dimension: 354×345×437mm
Box dimensions: 440×395×515mm
Net mass: 30.5kg
Starting method: Electric/kick start