GY6 Final Drive Lightweight Gears

Want more top speed without giving up spool response? These ProBld lightweight final drive gears are 20% lighter than standard gear-up kits — meaning quicker revs with a higher final drive ratio 🏁⚙️

• 🪶 20% lighter rotating mass for faster engine response
• 🚀 Higher top speed capability
• 🎯 Best for builds with strong low-end torque

The Details ⚙️

These gears are designed for riders who want the benefits of a gear-up kit but don’t want to lose throttle response or acceleration. By reducing rotating mass by roughly 20%, the engine can spool up faster — helping balance the typical downside of tall gearing. That means acceleration stays lively while still gaining more top-end speed.

If you're running a built engine or already feel like you have solid low-end torque, these gears are a great match. If you're still stock or mild, you may want to consider a big bore kit, CVT tuning, or variator upgrade to help support the taller gearing.

Installation requires basic tools and a press. If you don’t have a press, we can ship them already installed on a new countershaft for a simple bolt-in experience.

🔧 Want the pre-pressed drop-in version? CLICK HERE

This listing is for the gears only — no gasket or oil included.

Limited production runs — if your size option is in stock, grab it before it cycles out ⏳🔥

What's Included 📦

• 🦾 ProBld lightweight final drive gear set
• 📏 Ratio matched to the engine size you select (dropdown)

Important Things to Note 🚨

• Designed for Chinese QMI152 and QMJ157 engines only (GY6 + Ruckus swap engines).
• You may notice reduced low-end torque depending on build setup.
• Works best on modified engines or CVT-tuned setups.

Not sure what ratio or setup makes sense for your build? Send us a message — we’ll help dial it in 👍