{"product_id":"rdln-racing-variator-with-roller-tuning-kit-139qma-139qmb","title":"RDLN Racing Variator with Roller Tuning Kit; 139QMA, 139QMB","description":"\u003cp\u003eThe RDLN Racing Variator with tuning kit contains the complete drive pulley variator assembly and 3 complete sets of roller weights to improve the acceleration, top speed, and overall performance of your 139QMA\/139QMB GY6 scooter engine. Benefits: Modified ramp plate increases your engine's maximum power output. Copper core and wear-resistant nylon mean the roller weights last longer. The included roller weight tuning kit allows you to customize motor power output for acceleration and top speed. Specifications: Variator Outer Diameter: 89mm Variator Inner Diameter: 20mm Drive Boss Outer Dimension: 20mm Drive Boss Inner Dimension: 14mm Drive Boss Length: 38mm Roller Weight Size: 16x13mm Set of 6 Roller Weights: 6g each Set of 6 Roller Weights: 7g each Set of 6 Roller Weights: 8g each Compatibility: 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. Roller Weight Tuning Kit information: Alternating different roller weights allows you to fine-tune your engine output characteristics. For example, by alternating 3- 7g rollers and 3- 8g rollers in the variator, you can achieve a 7.5g roller set. Lighter weights increase RPMs for a given road speed, while heavier weights lower RPMs for a given road speed. Tailor your tuning to match your engine setup and personal driving style. *DANGER: Weights must be installed in a 120-degree pattern! If not, SEVERE ENGINE DAMAGE WILL RESULT!!! About RDLN: RDLN is a premier line of aftermarket performance upgrade systems and components for scooters. RDLN products are engineered to significantly improve the function, performance, and reliability of your vehicle with the ultimate goal being an optimal balance of price, power, and performance. RDLN’s extensive field-testing network ensures each product exceeds customer requirements and expectations every time. RDLN delivers full-throttle performance at uncompromised quality. This product is intended for off-road use only. This product is not intended for use on public roads or land. This product is not legal for use in California on pollution-controlled vehicles. Check local laws before installing. *Performance upgrades are considered racing parts and are not covered by warranty.\u003c\/p\u003e","brand":"rdln","offers":[{"title":"Default Title","offer_id":48045307396283,"sku":"1200-1273","price":49.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0719\/1340\/6651\/files\/1200-1273.webp?v=1783056475","url":"https:\/\/thriftyscooters.com\/products\/rdln-racing-variator-with-roller-tuning-kit-139qma-139qmb","provider":"Thrifty Scooters","version":"1.0","type":"link"}