Description
Comparison points and tradeoffs
When comparing Bicycle Engine Motor Kit – 49cc 2-Stroke Motorized Bike Kit with Fuel Tank & Single Cylinder Air Cooled Engine Motor for Pocket Bike, Mini Dirt Bike, ATV, or Scooter with other Rebuild Kits options, use this source-backed detail as the primary discriminator: Fuel Consumption: ≤610g/kW.h Spark Plug: L6T or MB6A Spark Plug Gap: 0.5mm/0.02in Bore * Stroke: Φ44*32.8mm/1.7*1.3in Carburetor Type: H117B Reduction Ratio: 1:1 Noise Level: 100.7dB (SPL); 116.9dB (SWL) Fuel Mixture (90# Gasoline : 2-stroke Engine Oil): 25:1 (Early); 30:1 (Later) Fuel Tank Capacity: 1.2L/0.32gal Fuel Tank Size: 23*12*12cm/9.1*4.7*4.7in Engine Dimensions: 29*14*22.6cm/11.4*5.5*8.9in Package Size: 34*.
Use this second fact to evaluate the tradeoff: Manufacturer Part Number: EMK049. A third point to compare across alternatives is: Specification Engine Type: Single Cylinder, 2 Stroke, Air-cooling Material: Aluminum Color: Silver, Black Ignition System: Electronic Ignition Start Mode: Pull Rope Start Shifting Way: Sprocket Clutch: Dry Swing Block Clutch Displacement: 49.85CC Max.
Alternative-selection boundary
Choose an alternative when its stated identifiers, application, package, or specifications better match the requirement; no unverified competitor claim is introduced here.
Complete source-backed product details
| Manufacturer | UTWCWB |
|---|---|
| Brand | KWCWB |
| Model | Engine Motor Kit |
| Country of Origin | China |
| Item model number | EMK049 |
| Exterior | Polished |
| Manufacturer Part Number | EMK049 |
Specification
Engine Type: Single Cylinder, 2 Stroke, Air-cooling Material: Aluminum Color: Silver, Black Ignition System: Electronic Ignition Start Mode: Pull Rope Start Shifting Way: Sprocket Clutch: Dry Swing Block Clutch Displacement: 49.85CC Max. Power: 1.9kw/7000rpm Rated Power: 1.7kw/6000rpm Continuous Power: 1.6kw/5500rpm Overload Power: 1.83kw/6500rpm No-load Speed: 12500rpm Max. Speed: 48km/h Max. Torque: 2.7N.M/6500rpm Max. Horsepower: 3PS Max. Load Capacity: 180kg/396.8lbs Min. Fuel Consumption: ≤610g/kW.h Spark Plug: L6T or MB6A Spark Plug Gap: 0.5mm/0.02in Bore * Stroke: Φ44*32.8mm/1.7*1.3in Carburetor Type: H117B Reduction Ratio: 1:1 Noise Level: 100.7dB (SPL); 116.9dB (SWL) Fuel Mixture (90# Gasoline : 2-stroke Engine Oil): 25:1 (Early); 30:1 (Later) Fuel Tank Capacity: 1.2L/0.32gal Fuel Tank Size: 23*12*12cm/9.1*4.7*4.7in Engine Dimensions: 29*14*22.6cm/11.4*5.5*8.9in Package Size: 34*21*23.5cm/13.4*8.3*9.3in Net Weight: 3.85kg/lbs Gross Weight: 4.3kg/lbs Package Included
1* Engine 1* 25H-136L Chain 1* Kill Switch 1* Throttle Grip 1* Left Grip Cover 1* Fuel Tank 1* Throttle Cable Other Accessories for Installation Notes
1.Please check the parameters carefully before making payment. 2.Please allow the slight color difference caused by the shooting light and 1-3cm error due to manual measurement, and make sure you do not mind before ordering.
Source product highlights
- Powerful Engine: The 2-stroke engine can provide higher intake and exhaust efficiency, saving energy and fuel (Fuel Consumption: Min. ≤610g/kW.h). It can provide stronger power (Max. Power: 1.9kw/7000rpm) during driving and ensure that your drive will be very smooth and powerful.
- Outstanding Performance: With its outstanding performance parameters, this well-designed engine can reach a Max. speed of 48km/h. In addition, it has extraordinary load-bearing capacity (396.8 lbs), adapting to the various needs of different groups of people, and ensuring excellent power performance in any situation.
- Large Capacity: Designed with a large capacity fuel tank (0.32 gal), this engine can work for a long time and meet the needs of long-distance driving (15-20km with full oil). It ensures reliable performance without frequent refilling.
- Effective Cooling System: By adopting an air cooling system, the temperature of the engine can be quickly reduced, effectively preventing overheating and ensuring smooth and long-lasting driving.
- User-friendly Design: Compared to other engine kits, this one has the upgraded CVT gearbox, which effectively improves the operational efficiency and response speed of the entire system. It is also equipped with a stable bearing to ensure its operation process smoothly.




Adela Hodgson –
I bought this to motorize an old bike, and it works surprisingly well. Not a speed demon, but it gets me around town without breaking a sweat. The fuel tank lasts longer than I expected—nice for short commutes.