QMB139 39mm Cylinder Head 50cc


Cylinder for 50cc 4-stroke QMB139 engines.

Bore: 39mm

QMB139 50cc/49cc , Various unlisted makes/models


Cylinder for 50cc 4-Stroke QMB139 Engines

Product Description:

This high-quality cylinder is specifically designed for 50cc 4-stroke QMB139 engines, featuring a bore size of 39mm. It is an ideal replacement part for a wide range of scooters with QMB139 engines, ensuring reliable performance and a precise fit.

Key Features:

  • Precise Bore Size: The cylinder has an exact bore diameter of 39mm, ensuring compatibility with 50cc 4-stroke QMB139 engines.
  • Wide Compatibility: Suitable for various unlisted makes and models equipped with QMB139 50cc/49cc engines.
  • Durable Construction: Made from high-quality materials to withstand the rigors of engine operation, providing long-lasting performance.
  • Optimized Performance: Ensures efficient combustion and power output, maintaining the engine’s performance and fuel efficiency.


  • Bore Diameter: 39mm
  • Engine Compatibility: 50cc/49cc 4-stroke QMB139 engines
  • Material: High-grade aluminum alloy for durability and heat dissipation
  • Height: Standard height to match OEM specifications

Package Includes:

  • 1 x 39mm Cylinder for QMB139 engines
  • Installation guide

Ensure your 50cc 4-stroke QMB139 engine delivers optimal performance with this precisely engineered 39mm bore cylinder. Suitable for a variety of scooter makes and models, it provides a reliable and durable replacement to keep your engine running smoothly.



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