The Jinlang 1P39QMB-B is a 0.05 l (49.6 cc, 3.03 cu-in) single cylinder, 4-stroke, forced air-cooled internal combustion motorcycle engine, manufactured by Zhejiang Jinlang Power Co. LTD.
A 39 mm (1.54 in) cylinder bore and 41.5 mm (1.63 in) piston stroke give the motor a total of 49.6 cc (3.03 cu-in) of displacement, compression ratio rating is 10.5:1. The 1P39QMB-B produced 3.0 PS (2.2 kW; 3.0 HP) at 7,500 rpm of maximum horsepower and 2.8 Nm (0.3 kg·m; 2.1 ft·lb) at 6,000 rpm of torque. Minimum idling speed is 2,000 rpm.
General information
| Engine Specifications | |
| Model | Jinlang 1P39QMB-B |
| Type | Four-stroke, single cylinder |
| Displacement | 49.6 ml (3.03 cu-in) |
| Max. horsepower | 3.0 PS (2.2 KW; 3.0 HP) at 7,500 rpm |
| Max. torque (crank PTO) | 2.8 Nm (0.3 kg·m; 2.1 ft·lb) at 6,000 rpm |
| Cooling system | Forced-air |
| Ignition system | Capacitance discharge ignition (CDI) |
| Lubricating system | Splash |
| Starting system | Electric / kick |
| Fuel used | Unleaded gasoline (octane number 86 or higher) |
Dimensions and Weight
| JL 1P39QMB-B | |
| Length, mm (in) | 620 (24.4) |
| Width, mm (in) | 390 (15.4) |
| Height, mm (in) | 310 (12.2) |
| Dry weight, kg (lb) | 21.5 (47.4) |
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