Glixal GY6 Rear Clutch Driven Pulley Assembly for 49cc–50cc (139QMB/139QMA) — Clutch Bell & Shoes, Bearings Included

Glixal GY6 Rear Clutch Driven Pulley Assembly with clutch bell is a direct-replacement drivetrain unit for 49cc–50cc 4-stroke GY6 engines, engineered to restore smooth power transfer on scooters, ATVs and go-karts.

This complete rear clutch assembly replaces worn pulley and bell components on popular 139QMB / 139QMA 49cc–50cc GY6 engines. Built as a 100% new aftermarket unit, the set fits most Chinese-made 4-stroke scooters and small ATVs from brands like Jonway, Roketa, Taotao, Sunl and many others. It includes the driven pulley, clutch bell, clutch shoes sized for the GY6 platform and quality bearings (6901-RS and HK172518RS) for reliable operation under normal riding conditions.

Will this assembly fit my 139QMB or 139QMA engine?

If your vehicle uses a GY6-style 49cc or 50cc 4-stroke engine, this Glixal rear clutch assembly is designed to fit both long and short case versions. Check the clutch bell spline count and diameters to confirm compatibility before ordering.

• Matches GY6 139QMB / 139QMA engine families for 49cc–50cc
• Clutch bell with 22 splines, 115mm outer diameter
• Bell inner diameter (splines peak-to-peak): 11mm
• Pulley outer diameter: 118mm; clutch shoe size: 16 x 55.5mm

What components and materials are included in the kit?

The assembly ships as a complete rear-driven pulley package containing the outer pulley, clutch shoes mounted to the carrier, clutch bell and bearings. Bearings used are the sealed 6901-RS and a HK172518RS needle bearing to support rotational loads and minimize play.

• Complete driven pulley with clutch shoes installed
• Clutch bell (outer Ø 115mm, inner Ø 107mm)
• 6901-RS sealed bearing and HK172518RS needle bearing for durability
• Pre-measured friction shoe dimensions for accurate fit

How will installing this pulley assembly affect scooter performance?

Replacing a worn pulley and clutch bell restores consistent engagement, reduces slippage and helps return original acceleration characteristics. While this kit is an OEM-style replacement rather than a performance upgrade, a properly functioning clutch assembly improves throttle responsiveness and drivetrain efficiency.

• Reduces clutch slippage and uneven engagement
• Restores factory-like acceleration and throttle feel
• Minimizes vibration from worn bearings or bell imbalance
• Compatible with stock variator and belt setups

What should I check before replacing my clutch assembly?

Before installation, verify spline count, bell inner diameter clearance and shoe dimensions to ensure a correct match. Inspect the variator belt and engine case for wear; replacing the belt along with the clutch assembly is often recommended to avoid premature failure.

• Confirm 22-spline clutch bell and 11mm peak-to-peak spline measurement
• Measure belt width and condition; replace if glazed or cracked
• Check engine case length (long or short) — this unit fits both
• Torque hardware to manufacturer specs during installation

Who this is for: This Glixal rear clutch driven pulley assembly is aimed at scooter and small-ATV owners, mechanics and restorers who need a reliable, budget-friendly replacement for original GY6 49cc–50cc clutch components. It suits riders of Chinese-made scooters and go-karts (Jonway, JMSTAR, Roketa, Sunl, Taotao, Kazuma and similar) who want to restore dependable drivetrain engagement without custom modification. If you’re replacing a worn pulley, bell or bearings and want an all-in-one kit that drops into most GY6 setups, this model provides a practical, uncomplicated swap.