{"product_id":"prima-roller-weight-set-16x13-mm-6-pcs-roll16x13-1","title":"Prima 16x13mm CVT Roller Weights | 139QMB Ruckus Buddy 50","description":"\u003cp\u003eSelecting optimal roller weights for your personal preference will deliver the most cost-effective performance upgrade you can make to a CVT scooter. The \u003cstrong\u003ePrima 16x13mm Roller Weight Set \u003c\/strong\u003e(6 per pack) is precision-manufactured to exact tolerances for smooth, consistent shifting and long-term durability in high-heat CVT environments. Whether you want snappier off-the-line pull or a higher top-end cruise, swapping rollers gets you there without touching the carb or exhaust.\u003c\/p\u003e\u003ch2\u003eCVT Tuning Guide\u003c\/h2\u003e\u003cp\u003eChoosing the right weight depends on your riding goals and body weight:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLighter Weights (3g–5g):\u003c\/strong\u003e Quicker acceleration, better hill climbing, ideal for heavier riders. \u003cem\u003eMay slightly reduce top-end speed.\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMid-Range Weights (6g–8g):\u003c\/strong\u003e Balanced daily commuting — closest to stock feel for most 50cc scooters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavier Weights (9g–11g):\u003c\/strong\u003e Higher top-end speed on flat roads, best for lighter riders. \u003cem\u003eAcceleration will be more gradual.\u003c\/em\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e 16mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 13mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 6 weights per pack\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Standard variators requiring 16x13mm rollers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eDirect replacement for \u003cstrong\u003e49cc–80cc 4-stroke (139QMB \/ GY6 50)\u003c\/strong\u003e engines and premium 50cc models from Genuine, Honda, and Yamaha.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eGenuine Scooter Co. (2-Stroke):\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuddy 50 \/ International:\u003c\/strong\u003e Stock 7.5g–8.5g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoughHouse 50 \/ Sport \/ Titanium:\u003c\/strong\u003e Stock 7.5g–8.5g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRattler 50:\u003c\/strong\u003e Stock 11.5g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlack Cat 50:\u003c\/strong\u003e Stock 7.5g–8.5g\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHonda \u0026amp; Yamaha (4-Stroke):\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonda Ruckus (NPS50):\u003c\/strong\u003e All years\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonda Metropolitan (CHF50):\u003c\/strong\u003e 2002–2012\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYamaha C3 (XF50):\u003c\/strong\u003e 2007–2011\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYamaha Vino 50:\u003c\/strong\u003e 4-stroke models\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYamaha Zuma 50F \/ 50FX:\u003c\/strong\u003e 4-stroke models (2012+)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eChinese \u0026amp; Taiwanese 50cc (GY6 50 \/ 139QMB):\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eChicago Scooter Co. Go. 50, Go. Max 50\u003c\/li\u003e\n\u003cli\u003eWolf Brand Scooters: RX-50, Islander, Lucky, Blaze, MOTO\u003c\/li\u003e\n\u003cli\u003eTaoTao \/ Tao Motors: ATM50-A1, Pony, VIP, Thunder\u003c\/li\u003e\n\u003cli\u003eLance \/ SYM: Cali Classic 50, PCH 50, Cabo 50\u003c\/li\u003e\n\u003cli\u003eKymco: Agility 50, Super 8 50 (4-stroke)\u003c\/li\u003e\n\u003cli\u003eBintelli \/ Ice Bear: Breeze, Havoc, Maddog 50, PMZ50\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eEngine Code Compatibility\u003c\/h2\u003e\u003cp\u003eDon’t see your model? If your engine tag contains any of the following codes, these 16x13mm weights are compatible:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003e139QMA\u003c\/th\u003e\n\u003cth\u003e139QMB\u003c\/th\u003e\n\u003cth\u003e1P39QMB\u003c\/th\u003e\n\u003cth\u003e1P39QMA-2\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eYN139QMB\u003c\/td\u003e\n\u003ctd\u003eJJ1P39QMB\u003c\/td\u003e\n\u003ctd\u003e139FMA-2\u003c\/td\u003e\n\u003ctd\u003eBD1P39QMB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBN139QMB\u003c\/td\u003e\n\u003ctd\u003e147QMD\u003c\/td\u003e\n\u003ctd\u003eOther 50cc QMA models\u003c\/td\u003e\n\u003ctd\u003eOther 50cc QMB models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"http:\/\/www.p65warnings.ca.gov\"\u003eCalifornia Prop 65 Warning: www.p65warnings.ca.gov\u003c\/a\u003e\u003c\/p\u003e","brand":"Prima","offers":[{"title":"Default Title","offer_id":48111788130491,"sku":"ROLL16X13 6.0 G","price":11.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0719\/1340\/6651\/files\/roll16x13_eaaf955d-c78e-4d0a-a944-259285f56ceb.jpg?v=1784294928","url":"https:\/\/thriftyscooters.com\/products\/prima-roller-weight-set-16x13-mm-6-pcs-roll16x13-1","provider":"Thrifty Scooters","version":"1.0","type":"link"}