NCY Super Transmission Kit - Buddy 50, 139QMB, GY6 50cc

Total Transformation: NCY Super Transmission Performance Kit

Eliminate CVT lag and unleash the full potential of your 50cc engine with the NCY Super Transmission Kit. This is the most comprehensive bolt-on performance set available, engineered to deliver explosive off-the-line acceleration, lightning-fast downshifting, and a higher top-end cruising speed. Whether you are navigating heavy city traffic or opening it up on the backroads, this professionally curated kit replaces your entire drive system with high-performance components designed to work in perfect harmony.

What’s Inside the Box?

• NCY Ultralight Drive Face: Reduced rotational mass for faster RPM pickup and improved throttle response.
• Coated Golden Pulley & Pressure Plate: Features a specialized low-friction coating and optimized ramp angles for smooth, "notching-free" shifting.
• NCY Racing Clutch & Bell: High-friction clutch shoes and a vented bell provide maximum grip and heat dissipation, eliminating clutch "shudder."
• Triple Tuning Roller Set: Includes three full sets of 16x13mm weights (7g, 8g, and 9g) so you can perfectly dial in your RPMs to your specific weight and riding style.
• 1000 RPM Compression Spring: Provides the ideal return tension for rapid downshifting when decelerating or climbing hills.

Comprehensive Fitment Guide

This kit is a direct performance upgrade for 50cc and 80cc (139QMB/GY6) engines:

Technical Specifications

• Variator Size: 16mm x 13mm
• Included Weights: 7g, 8g, and 9g (Sets of 6 each)
• Spring Rate: 1000 RPM 
• Clutch Type: NCY Performance Non-Adjustable

Mechanic's Note: This is our #1 recommended upgrade for any 50cc scooter.

Fitment Warning: For Genuine Buddy 50 and RoughHouse 50 owners, you must reuse your original OEM outer drive face for proper clearance.

Tuning Tip: Start with the 8g weights for a balanced feel; if you want more "zip" off the line at the expense of fuel economy, drop down to the 7g weights.

Pro Tip: Always install a fresh Premium Drive Belt when installing this kit to ensure maximum grip!

This product is intended for off-road use only.

This product is not intended for use on public roads or land.

*Performance upgrades are considered racing parts and are not covered by warranty. 

WARNING: California’s Proposition 65

SKU: 1200-1171
Vendor: NCY

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