NCY Performance Adjustable Sheave Clutch Pulley - GY6 & Navi
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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.
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