Performance Variator Drive Face for 50cc (139QMB) / GY6 50
ITEM# TT-16533
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Description
Performance Variator Drive Face for 50cc QMB139 and GY6 Engines
This CNC-milled Performance Variator Drive Face is made for the 50cc QMB139 (GY6) engine family. It can reduce belt slippage and sharpen throttle response, which makes it a useful upgrade for better performance. Browse more GY6 50cc scooter parts. This piece takes the place of the stock cast face, which may wear grooves that slow acceleration and disrupt gear changes.
CNC Machined Precision
The drive face has a precision-cut surface that gives a flat contact area. This layout cuts down on friction and heat, helping to stop belt slip and boost overall efficiency throughout the rev range. The red anodized coating looks sharp and also helps dissipate heat, which can extend the drive belt's service life.
Compatibility and Installation Notes
This drive face is built to work with the stock electric start and kick start parts, along with the factory plastic cooling fan. When swapping it in, plan to move the kick start gear and cooling fan over from your old unit, since neither comes with this part.
Specifications
- Material: CNC machined aluminum
- Finish: Red anodized
- Spline Count: 26
- Fits: 139QMB / QMB139 / GY6 50cc 4-stroke engines (engine codes 139QMB, 1P39QMB, 139QMA)
Fitment
Fits:
- 139QMB / QMB139 / GY6 50cc 4-stroke engines (139QMB, 1P39QMB, 139QMA)
- TaoTao, Wolf, Ice Bear, Bintelli, Kymco and SYM 50cc scooters with these engines
How to choose: Check that your engine code is 139QMB, 1P39QMB or 139QMA, and confirm the crankshaft has a 26-spline center hub.
Shop more: GY6 50cc Scooter Parts (139QMB) · GY6 Scooter Parts · Scooter Variators & Roller Weights · Scooter Transmission & Final Drive · Scooter Parts
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