150cc Scooter Variator Tuning Kit

Want to fine-tune your GY6 variator without buying multiple full roller sets? This tuning kit makes it easy to test roller combinations and dial in your CVT for your weight, riding style, and engine setup 🎯⚙️

• 🔧 Includes 12 different weight options
• 🧪 Perfect for testing and dialing performance
• 💰 Saves money vs buying full roller sets one by one

The Details ⚙️

This tuning kit is designed specifically for **GY6 QMJ157 engines** and includes 12 sets of rollers (3 per set) — a total of 36 rollers. It allows you to test different setups, improve acceleration, adjust RPM behavior, and find the perfect balance between low-end pull and top-end speed.

Staggering roller weights is the key to getting the best performance — especially if you're running a variator upgrade, big-bore kit, clutch upgrade, or performance exhaust. The video below breaks down exactly how to set up staggered roller tuning.

Whether you’re dialing in a fresh build or refining an existing setup, this kit gives you everything needed to experiment and find that sweet spot. 🏁

Pro tip: Pair tuning rollers with a performance variator for the biggest difference.

What's Included 📦

• 🎯 (12) Roller sets — 3 weights per set
• 🧰 (36) Total roller weights
• 📏 Storage tray with labeled weight slots

Important Things to Note 🚨

• For **GY6 QMJ157** engines only — long case or short case.
• Rollers may need mixing or staggering for best performance.
• Always tune based on real-world riding, not just theory.

Not sure where to start with roller weights? Send us a message — we’ll help get you close 👍