SSP-G QMB139 50cc performance clutch set with ventilated clutch bell — SKU 169-509 SSP-G QMB139 50cc performance clutch set with ventilated clutch bell — SKU 169-509
SSP-G performance clutch assembly components — torque spring, clutch springs, and ventilated bell SSP-G performance clutch assembly components — torque spring, clutch springs, and ventilated bell
SSP-G 50cc performance clutch pulley view — fits 139QMB and 139QMA engine codes SSP-G 50cc performance clutch pulley view — fits 139QMB and 139QMA engine codes
SSP-G QMB139 clutch bell detail — 107mm inner diameter, 22-spline, ventilated design SSP-G QMB139 clutch bell detail — 107mm inner diameter, 22-spline, ventilated design
SSP-G QMB139 50cc performance clutch set with ventilated clutch bell — SKU 169-509
SSP-G performance clutch assembly components — torque spring, clutch springs, and ventilated bell
SSP-G 50cc performance clutch pulley view — fits 139QMB and 139QMA engine codes
SSP-G QMB139 clutch bell detail — 107mm inner diameter, 22-spline, ventilated design

SSP-G

SSP-G 139QMB 50cc Performance Clutch Set

SKU 169-509
$150.00
Shipping calculated at checkout.
Description

Upgrade your 50cc scooter's clutch system with the SSP-G High Performance Clutch Assembly. Featuring a ventilated clutch bell for improved heat dissipation, this complete set includes performance clutch springs and a torque spring tuned for stronger engagement and better low-end response. All SSP-G parts are sourced from top manufacturers in Taiwan. SKU: 169-509.

Features:

  • Ventilated clutch bell for improved heat dissipation and longer clutch life
  • Includes 1500 RPM torque spring for stronger engagement
  • Includes 1000 RPM clutch springs for improved low-end response
  • Uses 6901 RS bearing — standard and easy to source
  • 22-spline clutch bell for secure, precise fitment
  • Direct fit for 139QMB-based 50cc and 80cc 4-stroke engines
  • Made in Taiwan by SSP-G

Specifications:

  • Clutch bell inner diameter: 107mm
  • Clutch bell outer diameter: 115mm
  • Clutch inner diameter: 12mm
  • Bearing: 6901 RS
  • Number of splines (clutch bell): 22
  • Splined inner diameter (peak to peak): 11mm
  • Splined inner diameter (valley to valley): 12mm
  • Includes: 1500 RPM torque spring, 1000 RPM clutch springs
  • SKU: 169-509

Compatible Engine Codes:

Engine Code Engine Code Engine Code Engine Code
139QMA 139QMB 1P39QMB 1P39QMA-2
YN139QMB JJ1P39QMB 139FMA-2 BD1P39QMB
BN139QMB 147QMD Other QMA models Other QMB models

Don't see your engine listed? If the 50cc engine code includes "QM" or "FM", this clutch set is likely compatible with your vehicle.

California Prop 65 Warning: www.p65warnings.ca.gov
Product Diagrams
Features
  • Ventilated clutch bell for improved heat dissipation and longer clutch life
  • Includes 1500 RPM torque spring for stronger engagement
  • Includes 1000 RPM clutch springs for improved low-end response
  • Uses 6901 RS bearing — standard and easy to source
  • 22-spline clutch bell for secure, precise fitment
  • Direct fit for 139QMB-based 50cc and 80cc 4-stroke engines
  • Made in Taiwan by SSP-G
Specifications

Clutch bell ID: 107mm | Clutch bell OD: 115mm | Clutch ID: 12mm | Bearing: 6901 RS | Splines: 22 | Splined ID (P-P): 11mm | Splined ID (V-V): 12mm | Includes: 1500 RPM torque spring, 1000 RPM clutch springs | SKU: 169-509
Model Fitments

Engine codes: 139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD, and other QMA/QMB/FM variants | Displacement: 50cc and 80cc 4-stroke
  • Same day shipping for orders placed before 2PM (CST) M-F
  • 30-day return period on eligible items
  • Flat-rate shipping for orders shipped to the 48 Contiguous United States.
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