{"product_id":"ssp-g-16x13-qmb139-roller-weight-tuning-kit","title":"SSP-G 16x13 QMB139 Roller Weight Tuning Kit","description":"\u003cp\u003eFine-tune your CVT variator with precision using the SSP-G 16x13 Roller Weight Tuning Kit, designed specifically for 50cc 4-stroke QMB139 engines. Instead of buying individual roller sets one at a time, this all-in-one kit gives you 12 complete weight options — from 3g to 14g — so you can dial in the perfect setup for your riding style and engine configuration. Roller diameter: 16mm Roller width: 13mm Includes 3-piece sets of: 3g, 4g, 5g, 6g, 7g, 8g, 9g, 10g, 11g, 12g, 13g, and 14g rollers (36 rollers total) Combine two sets in an alternating pattern to achieve half-gram increments (e.g., 3x 5g + 3x 6g = 5.5g effective weight) Designed for tuning and testing — not intended for permanent long-term use Compatible with QMB139 50cc\/49cc engines and various unlisted makes\/models Important: Rollers must be installed in an alternating pattern. Failure to do so will cause a severe imbalance in the variator. Once your ideal weight is determined, replace it with a full permanent roller set. California Prop 65 Warning: www.p65warnings.ca.gov\u003c\/p\u003e","brand":"ssp-g","offers":[{"title":"Default Title","offer_id":48045680459963,"sku":"169-448","price":40.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0719\/1340\/6651\/files\/452756.jpg?v=1783060024","url":"https:\/\/thriftyscooters.com\/products\/ssp-g-16x13-qmb139-roller-weight-tuning-kit","provider":"Thrifty Scooters","version":"1.0","type":"link"}