MFC·passion 125cc–150cc GY6 Variator Kit — Front Clutch Assembly, Red, Adjustable Rollers & Springs

Performance variator and clutch assembly for GY6 125cc–150cc engines, supplied with multiple roller weights, sliders, clutch springs and a CVT fan to tune acceleration and top speed. This MFC·passion variator kit is a complete front-clutch CVT upgrade designed to fit popular 4-stroke GY6-based scooters and small ATVs. Engineered from durable metal components and pre-packaged with changeable roller weights and auxiliary parts, the assembly lets you adjust drive characteristics without machining or specialized tools. The kit works with 152QMI and 157QMJ engines and fits many common Chinese and global scooter brands, giving a practical route to optimize throttle response and cruising behavior.

How will swapping roller weights change my scooter's performance?

Changing roller weights shifts how quickly the variator raises the gear ratio under acceleration. Lighter rollers let the variator climb faster for quicker initial acceleration, while heavier rollers hold the variator lower longer for improved top-end speed once the motor is at higher rpm.

• Included roller sizes: sets of 5g, 7g and 9g for tuning options.
• 18 x 14mm roller dimensions for direct fit in GY6 variators.
• Swap rollers in minutes—no machining required.

Will this variator assembly physically fit my scooter or quad?

The assembly is sized for common GY6 125cc and 150cc 4-stroke engines (152QMI / 157QMJ). Confirm hub bolt patterns and clutch shaft dimensions before ordering to ensure compatibility with your specific model.

• Variator outer diameter: 114.5mm (4.51") for standard fitment.
• Bushing OD 24mm, ID 15mm, length 52mm—matches many factory shafts.
• Compatible with many Zongshen, Lifan, JCL, Taotao and similar models.

What parts are included and why do they matter?

This kit supplies the core wear and tuning components you need to overhaul a front CVT drive: rollers, sliders, a CVT fan, clutch springs and the shaft. Having these items together avoids mismatched parts and lets you replace worn elements simultaneously for consistent operation.

• 3 x 5g rollers, 3 x 7g rollers, 3 x 9g rollers for tuning choices.
• 3 sliders and a CVT fan to restore smooth belt travel and cooling.
• 3 clutch springs and a CVT shaft for secure, reliable clutch engagement.

How durable and easy to install is this variator kit?

Constructed from high-quality metal parts, the assembly is built for routine use and replacement service intervals. Installation is straightforward for those familiar with basic CVT service—standard hand tools and a service manual or tutorial are recommended.

• Metal construction resists wear from normal belt and clutch operation.
• Pre-measured rollers and bushings simplify the tuning process.
• Package includes most fast-moving parts so you can complete the job in one session.

Who is this for This variator kit suits riders, mechanics and DIY enthusiasts who run GY6 125cc–150cc scooters, small quads or go-karts and want to restore worn CVT components or fine-tune drive characteristics. It's a practical option for those replacing an aging variator, experimenting with different acceleration profiles, or performing a full front-clutch refresh without sourcing multiple separate parts.

FAQ

Q: Does this kit fit 152QMI and 157QMJ engines?

A: Yes, the kit is designed for GY6-based 152QMI and 157QMJ 125cc–150cc engines, but verify shaft and hub dimensions before purchase.

Q: Which roller weights are included for tuning?

A: The package includes three each of 5g, 7g and 9g rollers to adjust acceleration and top speed.