Specifications:
Type: 1-cylinder, horizontal, 4-stroke, air-cooled electric and kick start
Bore x Stroke: 52.4mm x 55.5mm
Displacement: 120ml
Max. Power & Corresponding Speed: 5.8KW/7500rpm±375rpm
Max. Torque & Corresponding Speed: 8.5N.m/5000rpm±250rpm
Min. Fuel Consumption: Pollutant Index: =5.5 g/km (CO), =1.2g/km (HC) 0.23g/km(NOx)
Clutch Type: Centrifugal friction clutch Semi Auto
Start Mode: electric or kick start
Compression: 9.0:10
Gear ratio: 2.833/1.706/1.238/0.958
Ignition type and spark plug model: CDI, A7TC
Advance angle of ignition: 15°±1°/1500r/min
Starting performance: ≤15s
Valve clearance： 0.05mm
Carburetor type: PZ20
Total lubricating oil capacity: 900mL
Lubricating mode and type of lubricating oil pump: pressure and Splash, Internal and external rotor type
Dimensions: 470×275×280mm (18.5x10.8x11 inch)
Engine Oil: 900ml, 15W/40-SE, 4 stroke
Gears: 0-1-2-3-4 4 Up
Sprocket: 15T 428 CHAIN 20MM
Shaft: 20mm
Weight: 23kg

Instructions:
1.Check the oil level with a dipstick. If the oil level is lower than the lower cut line of the dipstick, add lubricating oil to the upper cut line .
2. Do not increase the load in the cooling machine, must preheat the engine 1 to 3 minutes in advance.
3. The break-in of the engine is very important. In a new engine within 650miles, the throttle should never be fully open and the gear should be changed at any time.Poor break-in leads to more faults. During break-in, the engine oil should be changed every 185 miles or so;After travelling 210 miles, an adjustment should be made to compensate for the slight wear during the break-in period, so as to ensure the good performance of the engine and extend its service life.For specific break-in requirements, refer to the instructions.
4. Idle adjustment
(1) Twist the idle screw clockwise completely into place, and then reverse 1 5/8 turn.
(2) Preheat the starting engine to the working temperature, and adjust the idle speed to 1500r/min±100r/min with the fixing screw of the oil door plunger.
(3) Then turn the idle fine-tuning screw to achieve the maximum steady speed of the engine, and then re-adjust the locking screw with the oil door plunger to the specified 1500r/min±100r/min.
5. Use of electric starting:
It is advisable to use electric starting in neutral.If electric starting is used in other gears, braking must be applied simultaneously.
If the battery power is not enough, just drive a few miles battery after automatic charging, can be used.