- Model NO.: F4B
- Speed: High Speed
- Ignition Mode: Compression-Ignition
- Cooling Cylinder: Water-Cooled
- Fuel: Gasoline Engine
- Stroke: Four Stroke
- Displacement: 139cc
- Gear Position: Forward-Neutral-Reverse
- Fuel Tank Capacity: 1.1L
- Specification: CE, SGS
- HS Code: 8407210000
- Intake Pressure Impulse: Supercharged
- Piston Movement: Rotary
- Number of Cylinders: Single-Cylinder Machine
- Number of Strokes: Four-Stroke
- Cylinder Arrangement Form: R
- Weight: 27kg
- Full Throttle Operating Range: 4000-5000 R/M
- Gear Ratio: 2.08(27:13)
- Trademark: EARROW
- Origin: Ningbo Zhejiang