NCY Adjustable Secondary Slider Pulley - Yamaha Zuma 2T

Transform your CVT's responsiveness and put your tuned engine's power to the pavement.

The NCY Adjustable Secondary Sliding Sheave is a must-have upgrade for high-performance Yamaha Zuma and Aprilia SR50 builds. Unlike stock pulleys, the NCY slider features aggressively angled slits designed to eliminate "belt hang-up" and provide smoother transitions throughout the RPM range. This results in more consistent acceleration and better back-shifting when coming out of corners.

Model Compatibility:

• Yamaha: Zuma 50cc (2-Stroke)
• Aprilia: SR50 (Minarelli Engines)
• Engine Type: Minarelli / Horizontal 50cc 2T

Key Performance Features:

• Adjustable Torque Settings: Linear and angled grooves allow you to customize the opening rate of the pulley.
• Smooth Shifting: Precision-machined slits reduce friction for a "no-snag" transition between belt positions.
• Pre-Installed Seals: Comes with rubber O-rings already installed for a leak-free setup.

Technical Specifications:

• Outer Diameter (OD): 115mm
• Funnel Inner Diameter (ID): 33mm
• Funnel Outer Diameter (OD): 41.95mm
• Height: 38mm
• Brand: NCY (ISO 9001 Certified)

Disclaimer: This is a performance racing part. It is intended for off-road/closed-course use only and is not legal for use on public roads or pollution-controlled vehicles in California.

About NCY: NCY is the aftermarket performance parts leader for the most popular powersports brands, including Honda, Yamaha, Genuine, Vespa, SYM, Lance, KYMCO, and GY6/QMB-powered scooters. Made in Taiwan with strict quality standards since 1997, NCY is ISO 9001 certified.

Made in Taiwan.

This product is intended for off-road use only.

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

This product is not legal for use in California on pollution-controlled vehicles. Check local laws before installing.

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