GY6 50cc QMB139 clutch assembly with bell for scooter or moped, silver metal part
GY6 50cc scooter clutch assembly with bell for QMB139 engines, metallic finish on white background
GY6 50cc QMB139 scooter clutch assembly with bell, metal components on white background
GY6 50cc clutch assembly with bell for scooter or moped, shown on white background
GY6 50cc scooter clutch assembly with bell, metal part on white background
GY6 50cc QMB139 clutch assembly and bell for scooter or moped on white background
GY6 50cc clutch assembly with bell and digital caliper measuring internal diameter
GY6 50cc QMB139 scooter clutch assembly with bell, measured with tape measure
GY6 50cc scooter clutch bell measured with tape, close-up, for motorcycle parts

QMB139 GY6 50cc Clutch Assembly with bell

$33.99
By ChinesePartsUSA

QMB139 GY6 50cc Clutch Assembly with Bell

This essential clutch assembly, designed for GY6 50cc 4-stroke engines like the 139QMB and 139QMA, ensures reliable power transfer for a wide range of scooters. It's a direct replacement part compatible with numerous makes and models, including Tank, SUNL, Roketa, Baja SC50, Schwinn, Panterra, and Kymco.

  • Pulley Outer Diameter: 118mm, optimized for efficient variator operation.
  • Clutch Bell Outer Diameter: 115mm, housing the clutch mechanism securely.
  • Clutch Bell Inner Diameter: 107mm, providing a precise fit for the bell.
  • Clutch Inner Diameter: 12mm, standard for many 50cc GY6 applications.
  • Clutch Shoe Outer Diameter: 104mm, ensuring proper engagement with the bell.

Engineered with precision, this clutch assembly features a 6901-RS bearing for smooth operation and durability. The clutch bell includes 22 splines with a peak-to-peak inner diameter of 11mm, ensuring a strong and secure connection to the drive system.

Compared to generic or older clutch designs, this QMB139 GY6 50cc assembly offers improved responsiveness and longevity, crucial for maintaining optimal performance in daily riding and performance tuning. Its robust construction supports the demands of typical scooter usage, making it a dependable upgrade or replacement for your 50cc GY6 engine.

Key Technical Advantages: Technology and Performance

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