Performance Variator Kit - 50cc (139QMB) GY6 50cc 4-Stroke

Performance Variator Kit for GY6 50cc 4-Stroke Scooters

This variator kit is built for 50cc 4-stroke scooters running the QMB139 / 139QMB engine. It is a full package for riders who want more from their CVT. It sits among our GY6 50cc scooter parts and can noticeably improve acceleration and general efficiency. It suits both stock scooters and those with mild tuning.

What Sets This Variator Kit Apart

The drive face is PTFE-coated, which cuts down on friction and helps protect the belt and rollers from wear. The movable face is aluminum and has red slider guides that help the belt engage smoothly. Everything needed for a simple installation is included, so it is a practical upgrade for your scooter's performance.

Build Specifics

The kit measures 88mm across the outside and is made for short-case 50cc CVT systems. It uses 6 roller weights, each 16x13mm, which help tune the CVT shift curve for a better ride. The kit also includes the key parts needed for a secure fit and dependable operation.

Specifications

• Drive Face Coating: PTFE (inner surface)
• Variator Outer Diameter: 88mm
• Includes: PTFE-coated variator drive face, movable face, 6 roller weights, bronze bushing, steel boss sleeve
• Engine: QMB139 / 139QMB 50cc 4-stroke
• Fits: QMB139 / 139QMB 50cc 4-stroke GY6 engines, 88mm short-case CVT, on the listed scooters

Compatible Scooters

Fits:

• Buddy 50
• RoughHouse 50
• Honda Ruckus (NPS50)
• KYMCO Agility 50, Vitality 50, Filly 50
• SYM Mio 50
• QMB139 / 139QMB 50cc / 49cc 4-stroke engines (various makes)

How to choose: Confirm your engine is a QMB139 / 139QMB, a 50cc 4-stroke with an 88mm short-case CVT. Check that your variator outer diameter is 88mm before you order.

Browse related parts: GY6 50cc Scooter Parts (139QMB) · GY6 Scooter Parts · Scooter Variators & Roller Weights · Scooter Parts