{"product_id":"gy6-50cc-139qmb-performance-clutch-torque-springs","title":"GY6 50cc (139QMB) Performance Clutch Torque Springs","description":"\u003ch2\u003ePerformance Clutch Torque Springs for GY6 50cc Scooters\u003c\/h2\u003e\u003cp\u003eThese performance clutch torque springs are made for GY6 50cc scooters and are matched to the QMB139 engine. They let you fine-tune the continuously variable transmission (CVT) so the scooter responds in a way that suits how you ride and what modifications you have. They are one of the \u003ca href=\"\/collections\/gy6-50cc-parts\"\u003eGY6 50cc scooter parts\u003c\/a\u003e that can noticeably affect acceleration and throttle response, which makes them a practical upgrade for both stock and modified machines.\u003c\/p\u003e\u003ch3\u003eEngagement Options\u003c\/h3\u003e\u003cp\u003eThe springs are offered in three RPM engagement ratings: 1000, 1500, and 2000 RPM. The 1000 RPM set engages earliest, which suits maximizing low-speed pull and easy stop-and-go travel around town. The 1500 RPM set is a middle choice that works well for everyday street use. The 2000 RPM set engages later, so it is better suited to riders running performance builds or larger bore kits who want a stronger high-end power band and better top-speed behavior.\u003c\/p\u003e\u003ch3\u003eCompatibility and Installation\u003c\/h3\u003e\u003cp\u003eThese springs have a 49mm inner diameter and are designed to work with QMB139 clutch assemblies, so they fit cleanly with compatible clutch bells. They can be used with a range of OEM and aftermarket clutch setups, giving you flexibility when tuning your scooter.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner Diameter:\u003c\/strong\u003e 49mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable RPM Options:\u003c\/strong\u003e 1000, 1500, 2000\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Compatibility:\u003c\/strong\u003e QMB139 50cc\/49cc 4-stroke\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e QMB139 50cc\/49cc 4-stroke engines and scooters using the 139QMB platform\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eQMB139 50cc\/49cc 4-stroke scooters\u003c\/li\u003e\n\u003cli\u003eTaoTao, Roketa, Jonway, Wolf, Ice Bear, Vitacci, Peace Sports and other makes\/models using the 139QMB engine platform\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Pick 1000 RPM for stock or lightly modified engines and stop-and-go riding, 1500 RPM for general street riding, or 2000 RPM for performance builds and big bore kits.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShop more:\u003c\/strong\u003e \u003ca href=\"\/collections\/gy6-50cc-parts\"\u003eGY6 50cc Scooter Parts (139QMB)\u003c\/a\u003e · \u003ca href=\"\/collections\/gy6-scooter-parts\"\u003eGY6 Scooter Parts\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-clutches\"\u003eScooter Clutches \u0026amp; Clutch Springs\u003c\/a\u003e · \u003ca href=\"\/collections\/scooter-parts\"\u003eScooter Parts\u003c\/a\u003e\u003c\/p\u003e","brand":"Trend Times Toy Stores","offers":[{"title":"2000","offer_id":51135902842937,"sku":"TT-16657","price":15.98,"currency_code":"USD","in_stock":true},{"title":"1000","offer_id":51135902875705,"sku":"TT-16658","price":15.98,"currency_code":"USD","in_stock":false},{"title":"1500","offer_id":51135902908473,"sku":"TT-16659","price":15.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/gy6-50cc-139qmb-performance-clutch-torque-springs-1.webp?v=1794350031","url":"https:\/\/www.trendtimes.com\/products\/gy6-50cc-139qmb-performance-clutch-torque-springs","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}