50cc Sooter QMB139 Bearing & Seal Kit


Crankshaft Bearing and Seal Kit for QMB139 50cc, 4-stroke engines. This precision Taiwanese bearing kit contains the right and left crankshaft bearings and seals.

6204C3 Bearing – Outer Diameter: 47mm, Inner Diameter: 20mm, Width: 14mm
CS-SC03A39 Bearing – Outer Diameter: 42mm, Inner Diameter: 17mm, Width: 13mm
19.8*30*5 Seal
16.4*30*5 Seal
Made in Taiwan

3 in stock


Product Description: Crankshaft Bearing and Seal Kit for QMB139 50cc Engines

Included Components:

  • 6204C3 Bearing:
    • Outer Diameter: 47mm
    • Inner Diameter: 20mm
    • Width: 14mm
  • CS-SC03A39 Bearing:
    • Outer Diameter: 42mm
    • Inner Diameter: 17mm
    • Width: 13mm
  • Seals:
    • 19.8305 Seal
    • 16.4305 Seal


  • Precision Engineering: Designed for optimal performance and durability in QMB139 50cc, 4-stroke engines.
  • Complete Kit: Includes both right and left crankshaft bearings and seals for comprehensive maintenance.
  • High-Quality Materials: Made from quality materials to withstand the demands of engine operation.
  • Taiwanese Manufacturing: Ensures precision and reliability, meeting strict quality standards.
  • Easy Installation: Designed for straightforward installation, minimizing downtime during maintenance.


The Crankshaft Bearing and Seal Kit is specifically designed for QMB139 50cc, 4-stroke engines, providing essential components for comprehensive maintenance. This kit includes precision-engineered bearings and seals for both the right and left crankshafts, ensuring optimal performance and durability. The 6204C3 and CS-SC03A39 bearings are manufactured to exact specifications, with dimensions tailored to fit the engine’s requirements. Additionally, the included seals are designed to prevent oil leaks and maintain proper lubrication within the engine. Made in Taiwan, these components undergo rigorous quality control processes to ensure reliability and performance. With this kit, scooter owners can easily perform crankshaft maintenance, ensuring smooth engine operation and prolonging the lifespan of their vehicles.



Additional information

Weight 1 lbs
Dimensions 8 × 5 × 6 in


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