{"product_id":"prima-16x13mm-cvt-roller-weights-139qmb-ruckus-buddy-50","title":"Prima 16x13mm CVT Roller Weights - 139QMB, Ruckus, Buddy 50","description":"Prima Roller Weight Set (16x13mm) – Precision CVT Tuning Fine-tune your scooter's performance with the Prima 16x13mm Roller Weight Set . Whether you are looking for quicker off-the-line acceleration or a higher top-end speed, changing your roller weights is the most cost-effective way to customize your ride's power delivery. Prima weights are manufactured to exacting tolerances to ensure smooth shifting and long-term durability in high-heat CVT environments. CVT Tuning Guide Choosing the right weight depends on your riding goals and body weight: Lighter Weights (3g - 5g): Ideal for quick \"stop-and-go\" acceleration, better hill climbing, and heavier riders. Note: May slightly decrease top-end speed. Mid-Range Weights (6g - 8g): Best for balanced daily commuting. These are typically close to the \"stock\" feel for most 50cc scooters. Heavier Weights (9g - 11g): Best for increasing top-end speed on long flat roads and for lighter riders. Note: Acceleration will be more gradual. Technical Specifications Diameter: 16mm Width: 13mm Quantity: 6 Weights per pack Compatibility: For use in standard variators requiring 16x13mm rollers. Detailed Model Fitment This 16x13mm set is a direct replacement for 49cc - 80cc 4-Stroke (139QMB \/ GY6 50) engines, as well as premium 50cc models from Genuine, Honda, and Yamaha. Genuine Scooter Co. (2-Stroke): Buddy 50 \/ International: (Stock: 7.5g - 8.5g) RoughHouse 50 \/ Sport \/ 50 Titanium: (Stock: 7.5g - 8.5g) Rattler 50: (Stock: 11.5g) Black Cat 50: (Stock: 7.5g - 8.5g) Honda \u0026amp; Yamaha (4-Stroke GET\/Liquid Cooled): Honda Ruckus (NPS50): All Years Honda Metropolitan (CHF50): 2002–2012 Yamaha C3 (XF50): 2007–2011 Yamaha Vino 50: 4-Stroke Models Yamaha Zuma 50F \/ 50FX: 4-Stroke Models (2012+) Chinese \u0026amp; Taiwanese 50cc (GY6 50 \/ 139QMB): Chicago Scooter Co: Go. 50, Go. Max 50 Wolf Brand Scooters: RX-50, Islander, Lucky, Blaze, MOTO TaoTao \/ Tao Motors: ATM50-A1, Pony, VIP, Thunder Lance \/ SYM: Cali Classic 50, PCH 50, Cabo 50 Kymco: Agility 50, Super 8 50 (4-Stroke) Bintelli \/ Ice Bear: Breeze, Havoc, Maddog 50, PMZ50 Engine Code Compatibility Don't see your model listed? If your engine tag contains any of the following codes, these 16x13mm weights are compatible 139QMB-based 50cc \/ 80cc engines with the following engine codes: 139QMA 139QMB 1P39QMB 1P39QMA-2 YN139QMB JJ1P39QMB 139FMA-2 BD1P39QMB BN139QMB 147QMD Other QMA models Other QMB models Don't see your engine listed? If the engine code includes \"QM\" or \"FM\", this product is compatible with your vehicle.","brand":"prima","offers":[{"title":"Default Title","offer_id":48045069959355,"sku":"ROLL16X13 7.5 G","price":11.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0719\/1340\/6651\/files\/roll16x13_37102171-392f-4d3d-b6d9-648ad3d1bfaf.jpg?v=1783051906","url":"https:\/\/thriftyscooters.com\/products\/prima-16x13mm-cvt-roller-weights-139qmb-ruckus-buddy-50","provider":"Thrifty Scooters","version":"1.0","type":"link"}