NCY Secondary Sliding Sheave Assembly; GY6, Buddy 4T
NCY Performance Adjustable Sheave Clutch Pulley: GY6 & Navi
$129.06
Out of stock
*Note: Free shipping to U.S. mainland (excludes AK, HI, and territories)
Orders placed by 1pm EST on weekdays ship the same day.
Product Details
DESCRIPTION: This adjustable Secondary Sliding Sheave Assembly from NCY will give your GY6 125/150cc or Buddy 4-stroke 125, 150 or 170i bike quicker takeoff and a higher top speed. By manipulating the belt contact area on the pulley, the secondary sliding sheave changes the gear ratio on the fly, thereby increasing power delivery.Compatibility:Genuine Buddy 125Genuine Buddy 150Genuine Buddy 170iChinese GY6 125/15cc enginesThis product will also fit 157QMJ-based 125cc / 150cc / 169cc engines with the following engine codes:157QMJ161QMK152QMI1P61QMKYN1P57QMJ1P52FMI154FMIJJ157QMJ1P57QMJBN157QMJBN161QMK-AOther QMJ, QMK, and QMI modelsDon’t see your engine listed? If the engine code includes “QM” or “FM”, this product is compatible with your vehicle.About NCY:NCY is the aftermarket performance parts leader for most popular scooter 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.*Performance upgrades are considered racing parts and are not covered by warranty.
COMPATIBILITY: Genuine Buddy 125Genuine Buddy 150Genuine Buddy 170iChinese GY6 125/15cc enginesThis product will also fit 157QMJ-based 125cc / 150cc / 169cc engines with the following engine codes:157QMJ161QMK152QMI1P61QMKYN1P57QMJ1P52FMI154FMIJJ157QMJ1P57QMJBN157QMJBN161QMK-AOther QMJ, QMK, and QMI modelsDon’t see your engine listed? If the engine code includes “QM” or “FM”, this product is compatible with your vehicle.About NCY:NCY is the aftermarket performance parts leader for most popular scooter 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.*Performance upgrades are considered racing parts and are not covered by warranty.
157QMJ ENGINES: based 125cc / 150cc / 169cc engines with the following engine codes:157QMJ161QMK152QMI1P61QMKYN1P57QMJ1P52FMI154FMIJJ157QMJ1P57QMJBN157QMJBN161QMK-AOther QMJ, QMK, and QMI modelsDon’t see your engine listed? If the engine code includes “QM” or “FM”, this product is compatible with your vehicle.About NCY:NCY is the aftermarket performance parts leader for most popular scooter 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.*Performance upgrades are considered racing parts and are not covered by warranty.
Compatibility / Fitment
Use the fitment details below to confirm this part matches your scooter before ordering.
- Engine Size: 125cc, 150cc, GY6, 4-Stroke
- Engine Code: 157QMJ
- Fits Models / Common Applications: Genuine Buddy and Honda Navi and other compatible models may apply.
- Fitment Notes: Performance
Fitment Guide: This compatibility information is based on manufacturer and supplier data. Listed models are common known applications and may not include every compatible scooter. If your scooter has multiple versions or production changes, confirm the correct match before ordering. Check photos, measurements, original part numbers, engine code, model, and related fitment information whenever possible.
Common Fitment Questions
Q: Will this fit a 157QMJ engine?
A: This SKU is listed as compatible with 157QMJ engine-code fitment. Always compare your original part and scooter details before ordering.
Q: Will this fit a Genuine?
A: This SKU is listed with Genuine model fitment where the scooter also matches the listed engine or fitment notes.
Q: Is this for 125cc scooters?
A: This SKU is listed with 125cc engine-size fitment. Confirm exact model, year, and part style before ordering.
Additional information
| Weight | 2.75 lbs |
|---|---|
| Dimensions | 7 × 6.5 × 4 in |
| Condition | New |
|---|
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.
