The NCY Secondary Slider (Sliding Sheave) is a performance rear converter plate for GY6 125cc and 150cc and most 161QMK engines (verify Pulley diameter). Engineered to replace the restrictive stock sheave, this precision-machined component optimizes belt movement across the entire RPM range for faster acceleration, smoother backshifts, and immediate throttle response.
Fits 157QMJ-based 125cc / 150cc / 169cc engines with the following engine codes:
This product is intended for off-road/racing use only. Not legal for use in California on pollution-controlled vehicles. Performance upgrades are not covered under warranty.
California Prop 65 Warning: www.p65warnings.ca.gov
