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: Engine / Model Popular Applications Genuine Scooter Co. Buddy 125, Buddy 150, Buddy 170i, Hooligan 170i Honda Navi 110 (Massive acceleration upgrade) GY6 125/150cc 157QMJ, 152QMI, 161QMK, 1P61QMK, BN157QMJ Kymco / SYM Agility 125, Super 8 150, Fiddle III 150 Wolf / Amigo / ZNEN Lucky II, EX-150, Venice 150, and most Retro/Sport 150cc builds 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.