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.
Shipping information
Orders are prepared as quickly as possible. Delivery times and shipping costs are calculated at checkout based on the destination and items ordered.
Returns & warranty
Please verify fitment and part number before ordering. Contact Thrifty Scooters promptly if an item arrives damaged or incorrect.