NCY Performance Roller Weights 16x13mm 139QMB & GY6 50-80cc

Fine-tune your scooter's CVT transmission with NCY 16x13mm Roller Weights . Available in 5g through 9g, these precision rollers let you dial in the perfect balance between low-end torque and top-end speed — and replacing worn, flat-spotted rollers restores lost performance and improves fuel efficiency. Key Features Precision Tuning — 5g–9g options to find your CVT sweet spot between acceleration and top speed Premium Durability — low-friction polymer sleeve with metal core, ISO 9001 certified, made in Taiwan Performance Recovery — eliminates high-rev lag and restores top speed lost to worn factory weights Sold as a set Specifications Dimensions: 16mm (diameter) × 13mm (width) Available Weights: 5g, 6g, 7g, 8g, 9g Material: Low-friction polymer sleeve with metal core Origin: Made in Taiwan Compatibility Fits a wide range of 50cc–80cc scooters using the 139QMB / GY6 50cc engine platform: Brand Compatible Models Genuine Scooter Co. Buddy 50, RoughHouse 50, Rattler 50, Black Cat 50 Honda Ruckus 50, Metropolitan 50 (pre-2011), Elite 50, Dio (AF25, AF27, AF28) Yamaha Zuma 50 (2-stroke), Vino 50, Jog 50 Chinese / Import All 139QMB / GY6 50cc–80cc engines (TaoTao, CSC Go, etc.) Compatible engine codes: 139QMA, 139QMB, 1P39QMB, 1P39QMA, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, LJ139QMB, 147QMD (GY6 80cc) Tuning Guide Lighter than stock — crisper acceleration, better low-end pull Same as stock — restored factory performance Heavier than stock — higher top speed with reduced acceleration Maintenance Tip: Inspect roller weights every 1,000 miles. Flat spots or a drop in top speed are signs it's time for a fresh set. About NCY NCY is the premier provider of aftermarket performance components for Honda, Yamaha, Genuine, Vespa, Piaggio, SYM, Lance, KYMCO, and GY6/QMB-powered scooters. ISO 9001 certified and made in Taiwan since 1997. California Prop 65 Warning: www.p65warnings.ca.gov