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Quick Details

  • Stroke: 4 Stroke
  • Cold Style: Air-Cooled
  • Start: Electric / Kick
  • Cylinder NO.: 1 Cylinder
  • Ignition Method: CDI
  • Displacement (ml): 125cc
  • Place of Origin: Chongqing, China (Mainland)
  • Brand Name: YX
  • Model Number: SY ENGINE18

Packaging & Delivery

Packaging Details carton

Details of YX 125cc Engine :


1.  Type:   4-stroke, air-cool, single cylinder, horizontal

Bore x StrokeTotal displacementLubrication SystemClutch Type Max.Net Power/rpm    Max.torque/rpm Valve clearance: Min. Fuel Consumption  Compression Ratio:   
          54×54 mm   124ml Wet SumpWet,Multi-plate 6-disc 5.2KW/8000±500r/min 7N.m/5000±500r/min  0.05±0.02mm


9.0: 1

1. Type:                4-stroke, air-cool, single cylinder, horizontal

2. Bore × stroke:            54×54

3. Total Displacement:      124ml

4. Compression Ratio:        9.0: 1

5Max.Net Power/rpm:    5.2KW/8000±500r/min

6Max.torque/rpm:      7N.m/5000±500r/min

7Min. Fuel Consumption : ≤367g/KW.h

8Ignition advance angle:        BTDC 27º±2º

9Valve clearance:            0.05±0.02mm

10Fuel Grade:              90# GB484-89

11. Engine Oil Grade:          SE: 15W/40

12Engine Oil Consumption Rate: ≤ 8g/KW.h

13Transmission Ratio:        Primary: 3.722

1gear: 2.833     2gear: 1.761

3gear: 1.280     4gear: 0.958

14Type of Spark plug:        1136 or 1137

15Gap of Spark plug:        0.6-0.7

16Ignition:                C.D.I

17. Clutch:              multi-plate oil bath Manual/automatic

18. Air Filter:              Paper Filter

19. Lubrication:            pressure and splash

20. Engine Oil Capacity:    0.9L

21. Starting:                kick/electric

22. Sizes:                 460mm* 300mm* 260mm

23. Net Weight:            20±1Kg



Our promise about YX 125cc Engine:                                                                

1. High quality and good service

2 . Accept small quantity order

3. Fast delivery

 pictures of YX125cc Engine                                                                                



 Packing show of pit bike parts  :                                                            



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pit bikeTrial-run                                                                                                                                      

 Team show                                                                                                                             


Our cooperative partner(pit bike parts)                                                                               

 About us                                                                                                                                       


 Our company is a manufacturer and trading company, which is established by some bike enthusiasts.We are specialized in the research, development and production of bike parts. All of our products comply with international quality standards and are greatly appreciated in a variety of different markets throughout the world.


If you are interested in any of our products , please feel free to contact us. We are looking forward to forming successful business relationships with new clients around the world in the near future!








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China (Mainland) | Manufacturer, Trading Company
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