Universal Parts CVT Drive Belt: 842-20-30: Long-Case GY6

Factory Performance: 842-20-30 Standard CVT Belt Restore your transmission's smooth shifting and top-speed potential with the Universal Parts Standard CVT Drive Belt . Specifically sized at 842-20-30, this belt is the factory-spec replacement for "Long Case" GY6 125cc and 150cc engines. Engineered to provide reliable grip and heat resistance, this belt ensures consistent power delivery from your variator to the rear clutch, making it an essential maintenance item for daily commuters and weekend riders alike. Technical Performance Features OEM-Spec Construction: Manufactured to match original factory dimensions and cord tension, ensuring your gear ratios remain accurate and your acceleration stays crisp. Durable Rubber Compound: Formulated to resist the high-friction heat generated within the CVT transmission case, reducing the risk of premature cracking or "glazing." Precision 30° Groove Angle: Optimized to seat perfectly within standard GY6 pulleys, providing maximum surface contact for slip-free performance under load. High-Tensile Internal Cords: Features reinforced longitudinal cords that resist stretching, maintaining the correct belt length for stable high-speed operation. Comprehensive Fitment Guide This 842mm belt is designed for Long Case GY6 125/150cc Engines , including the following specific models: Brand Compatible Models Vento Phantom R3 (150cc) '03 Vento Phantom R4i (150cc) '04-'06 (Non-Turbo) Chinese Brands BMS, Jonway, Roketa, and SunL 150cc "Long Case" units Universal Most 150cc scooters with 12" or 13" rear wheels Technical Specifications Length: 842mm (33.15") Top Width: 20mm Groove Angle: 30° Engine Type: GY6 125/150cc (Long Case) Mechanic's Note: The 842 size is almost exclusively used on "Long Case" engines that utilize a 12-inch or 13-inch rear wheel. If your 150cc scooter has a smaller 10-inch wheel, you likely need a 743 or 835 belt instead. Installation Tip: When installing a new belt, always check your Variator Slides and Roller Weights for flat spots to ensure the transmission shifts smoothly through its full range. SKU: 106-43 MPN: 219 Vendor: Universal Parts