{"product_id":"gy6s-1200-1273-red-line-racing-variator-with-tuning-kit-for-qmb139-50cc-100cc","title":"RED LINE RACING VARIATOR WITH TUNING KIT FOR QMB139 50cc - 100cc","description":"\u003ch2\u003eRDLN Racing Performance Variator Kit with Roller Weight Tuning Set\u003c\/h2\u003e \u003ch3\u003eFits 50cc, 80cc 139QMA \u0026amp; 139QMB GY6 Engines\u003c\/h3\u003e \u003cp\u003eUnlock faster acceleration, smoother CVT operation, and improved top-end performance with the \u003cstrong\u003eRDLN Racing Performance Variator Kit\u003c\/strong\u003e. Designed as a direct replacement for the factory variator, this complete performance kit includes three sets of precision roller weights, allowing you to fine-tune your scooter's power delivery for your riding style and engine modifications.\u003c\/p\u003e \u003cp\u003eWhether your goal is quicker launches, stronger mid-range power, or higher cruising speeds, this tuning kit provides the flexibility needed to dial in your CVT transmission.\u003c\/p\u003e \u003ch2\u003ePerformance Benefits\u003c\/h2\u003e \u003cul\u003e \u003cli\u003ePerformance ramp plate increases belt travel for improved power delivery\u003c\/li\u003e \u003cli\u003eQuicker throttle response and stronger acceleration\u003c\/li\u003e \u003cli\u003eImproved belt efficiency for smoother CVT operation\u003c\/li\u003e \u003cli\u003ePotential increase in top speed (depending on engine setup)\u003c\/li\u003e \u003cli\u003eIncludes three complete roller weight sets for custom tuning\u003c\/li\u003e \u003cli\u003ePrecision-machined variator components\u003c\/li\u003e \u003cli\u003eHigh-quality wear-resistant roller weights with copper cores\u003c\/li\u003e \u003cli\u003eDirect OEM-style replacement\u003c\/li\u003e \u003cli\u003eExcellent upgrade for stock or big bore GY6 engines\u003c\/li\u003e \u003c\/ul\u003e \u003ch2\u003eSpecifications\u003c\/h2\u003e \u003ch3\u003eVariator\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eOuter Diameter: \u003cstrong\u003e89mm\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003eInner Diameter: \u003cstrong\u003e20mm\u003c\/strong\u003e\n\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eDrive Boss\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eOuter Diameter: \u003cstrong\u003e20mm\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003eInner Diameter: \u003cstrong\u003e14mm\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003eLength: \u003cstrong\u003e38mm\u003c\/strong\u003e\n\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eRoller Weights\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eRoller Size: \u003cstrong\u003e16 x 13mm\u003c\/strong\u003e\n\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eIncluded:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e6 × \u003cstrong\u003e6 Gram Rollers\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003e6 × \u003cstrong\u003e7 Gram Rollers\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003e6 × \u003cstrong\u003e8 Gram Rollers\u003c\/strong\u003e\n\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eTotal Roller Weights Included:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\u003cstrong\u003e18 Precision Roller Weights\u003c\/strong\u003e\u003c\/li\u003e \u003c\/ul\u003e \u003ch2\u003eRoller Weight Tuning Guide\u003c\/h2\u003e \u003cp\u003eThis kit allows you to customize CVT performance without purchasing additional rollers.\u003c\/p\u003e \u003ch3\u003e6 Gram Rollers\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eHighest RPM\u003c\/li\u003e \u003cli\u003eFastest acceleration\u003c\/li\u003e \u003cli\u003eBest for modified engines and hill climbing\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003e7 Gram Rollers\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eBalanced acceleration and top speed\u003c\/li\u003e \u003cli\u003eExcellent all-around performance\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003e8 Gram Rollers\u003c\/h3\u003e \u003cul\u003e \u003cli\u003eLower cruising RPM\u003c\/li\u003e \u003cli\u003eImproved top speed potential\u003c\/li\u003e \u003cli\u003eBetter for long-distance riding\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eMix Roller Weights\u003c\/h3\u003e \u003cp\u003eRollers may be alternated to create intermediate weights.\u003c\/p\u003e \u003cp\u003eExample:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eAlternate \u003cstrong\u003ethree 7g\u003c\/strong\u003e and \u003cstrong\u003ethree 8g\u003c\/strong\u003e rollers to create an effective \u003cstrong\u003e7.5g setup.\u003c\/strong\u003e\n\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eAlways install mixed rollers in an alternating pattern.\u003c\/p\u003e \u003ch2\u003eIMPORTANT INSTALLATION NOTICE\u003c\/h2\u003e \u003cp\u003e\u003cstrong\u003eWARNING\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003eRoller weights \u003cstrong\u003eMUST\u003c\/strong\u003e be installed in a \u003cstrong\u003e120-degree alternating pattern.\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003eImproper installation can cause:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eSevere vibration\u003c\/li\u003e \u003cli\u003eCVT failure\u003c\/li\u003e \u003cli\u003eVariator damage\u003c\/li\u003e \u003cli\u003ePossible engine damage\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eAlways verify correct roller placement before operating the vehicle.\u003c\/p\u003e \u003ch2\u003eCompatibility\u003c\/h2\u003e \u003cp\u003eFits most 50cc and Big Bore 80cc GY6 scooters equipped with:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e139QMA\u003c\/li\u003e \u003cli\u003e139QMB\u003c\/li\u003e \u003cli\u003e1P39QMB\u003c\/li\u003e \u003cli\u003e1P39QMA-2\u003c\/li\u003e \u003cli\u003eYN139QMB\u003c\/li\u003e \u003cli\u003eJJ1P39QMB\u003c\/li\u003e \u003cli\u003e139FMA-2\u003c\/li\u003e \u003cli\u003eBD1P39QMB\u003c\/li\u003e \u003cli\u003eBN139QMB\u003c\/li\u003e \u003cli\u003e147QMD\u003c\/li\u003e \u003cli\u003eMost other QMA and QMB engine variants\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eAlso fits many engines whose code includes:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\u003cstrong\u003eQM\u003c\/strong\u003e\u003c\/li\u003e \u003cli\u003e\u003cstrong\u003eFM\u003c\/strong\u003e\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eCompatible with many scooters from:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eTaoTao\u003c\/li\u003e \u003cli\u003eIceBear\u003c\/li\u003e \u003cli\u003eWolf\u003c\/li\u003e \u003cli\u003eRoketa\u003c\/li\u003e \u003cli\u003eJonway\u003c\/li\u003e \u003cli\u003eTank\u003c\/li\u003e \u003cli\u003eBMS\u003c\/li\u003e \u003cli\u003ePeace Sports\u003c\/li\u003e \u003cli\u003eVitacci\u003c\/li\u003e \u003cli\u003eSUNL\u003c\/li\u003e \u003cli\u003eJMStar\u003c\/li\u003e \u003cli\u003eLance\u003c\/li\u003e \u003cli\u003eNST\u003c\/li\u003e \u003cli\u003eDongfang\u003c\/li\u003e \u003cli\u003eZnen\u003c\/li\u003e \u003cli\u003eMany other Chinese-built GY6 scooters\u003c\/li\u003e \u003c\/ul\u003e \u003ch2\u003ePackage Includes\u003c\/h2\u003e \u003cul\u003e \u003cli\u003e1 × RDLN Racing Performance Variator\u003c\/li\u003e \u003cli\u003e1 × Performance Ramp Plate\u003c\/li\u003e \u003cli\u003e1 × Drive Boss\u003c\/li\u003e \u003cli\u003e1 × Variator Assembly Hardware\u003c\/li\u003e \u003cli\u003e6 × 6g Roller Weights\u003c\/li\u003e \u003cli\u003e6 × 7g Roller Weights\u003c\/li\u003e \u003cli\u003e6 × 8g Roller Weights\u003c\/li\u003e \u003c\/ul\u003e \u003ch2\u003eAbout RDLN\u003c\/h2\u003e \u003cp\u003eRDLN is a premium manufacturer of high-performance aftermarket scooter components engineered to improve power, reliability, and overall ride quality. Every product is field-tested to provide an ideal balance of performance, durability, and value, making RDLN a trusted choice for both daily riders and performance enthusiasts.\u003c\/p\u003e \u003cp\u003e \u003c\/p\u003e","brand":"ChinesePartsPro","offers":[{"title":"Default Title","offer_id":53556434239800,"sku":"1200-1273","price":34.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0011\/8898\/6997\/files\/red__50021.1758056194.jpg?v=1792868894","url":"https:\/\/www.chinesepartspro.com\/products\/gy6s-1200-1273-red-line-racing-variator-with-tuning-kit-for-qmb139-50cc-100cc","provider":"ChinesePartsPro","version":"1.0","type":"link"}