NCY Performance Adjustable Sheave Clutch Pulley - GY6 & Navi

Maximize Your CVT Performance: NCY Adjustable Torque Driver

Eliminate mid-range "flat spots" and take full control of your powerband with the NCY Secondary Sliding Sheave. Engineered as a high-performance alternative to the linear factory pulley, this "Torque Driver" features dual-machined ramp angles. This allows you to choose between an aggressive curve for instant "off-the-line" snap or a progressive curve for smoother, high-velocity cruising.

Performance Advantages

• Dual-Angle Tuning: Two sets of guide pin slits let you customize your acceleration profile based on your riding style or track conditions.
• Consistent Shifting: Precision-machined internal paths eliminate the "belt hang-up" common in stock sheaves, keeping your engine in its optimal power band.
• Complete Pre-Sealed Assembly: Includes pre-installed high-temperature O-rings and oil seals, ensuring a leak-free, bolt-on installation right out of the box.
• Race-Grade Durability: Manufactured to ISO 9001 standards in Taiwan, designed to handle the high heat and friction of tuned 150cc to 232cc builds.

Technical Specifications

• Outer Diameter: 141.8mm
• Inner Diameter (Funnel): 34mm
• Material: High-Carbon Steel Alloy
• SKU: 1200-1198

Comprehensive Fitment Guide

This assembly is a direct performance replacement for 125cc, 150cc, and 170cc 4-stroke engines, including:

Tech Tip: For maximum performance, pair this torque driver with an NCY Gen 4 Performance Clutch and a 1500 or 2000 RPM Contra Spring. This combination ensures your belt stays tight and your RPMs stay high during hill climbs and heavy acceleration.

Performance Note: Greasing with high-temp Moly grease during installation is suggested for optimal performance.

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.

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