{"product_id":"gy6-50cc-139qmb-compression-spring-performance","title":"GY6 50cc (139QMB) Compression Spring (Performance)","description":"\u003ch2\u003ePerformance Compression Spring for 50cc 139QMB Engines\u003c\/h2\u003e\u003cp\u003eThis performance compression spring is built for 50cc 139QMB engines. It helps engage the belt and influences how the CVT transmission moves from low to high gear. Part of our \u003ca href=\"\/collections\/gy6-50cc-parts\"\u003eGY6 50cc scooter parts\u003c\/a\u003e range, it comes in three RPM ratings: 1k, 1.5k, and 2k, so you can match the setup to how you ride.\u003c\/p\u003e\u003ch3\u003eHow Compression Springs Work\u003c\/h3\u003e\u003cp\u003eCompression springs supply the pressure needed to engage the drive belt properly. The spring's RPM rating sets how the transmission shifts. A 1000 RPM spring starts a gear change at a lower speed than a 2000 RPM spring, which changes how the scooter feels during acceleration.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWire Diameter:\u003c\/strong\u003e 4.0mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner Diameter:\u003c\/strong\u003e 49.0mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 106.0mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable RPMs:\u003c\/strong\u003e 1k, 1.5k, 2k\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e 139QMB-based 50cc and 80cc GY6 engines with engine codes 139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eCompatible with:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e139QMA engines (50cc and 80cc)\u003c\/li\u003e\n\u003cli\u003e139QMB engines (50cc and 80cc)\u003c\/li\u003e\n\u003cli\u003e1P39QMB engines (50cc and 80cc)\u003c\/li\u003e\n\u003cli\u003e1P39QMA-2 engines (50cc and 80cc)\u003c\/li\u003e\n\u003cli\u003eYN139QMB engines (50cc and 80cc)\u003c\/li\u003e\n\u003cli\u003eJJ1P39QMB engines (50cc and 80cc)\u003c\/li\u003e\n\u003cli\u003e139FMA-2 engines (50cc and 80cc)\u003c\/li\u003e\n\u003cli\u003eBD1P39QMB engines (50cc and 80cc)\u003c\/li\u003e\n\u003cli\u003eBN139QMB engines (50cc and 80cc)\u003c\/li\u003e\n\u003cli\u003e147QMD engines (50cc and 80cc)\u003c\/li\u003e\n\u003cli\u003eOther QMA engines (50cc and 80cc)\u003c\/li\u003e\n\u003cli\u003eOther QMB engines (50cc and 80cc)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e Select the RPM rating based on your riding style. The 1000 RPM spring moves into a higher gear sooner, while the 2000 RPM spring keeps the lower gears engaged for longer.\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-parts\"\u003eScooter Parts\u003c\/a\u003e\u003c\/p\u003e","brand":"Trend Times Toy Stores","offers":[{"title":"1000 RPM","offer_id":51138660630585,"sku":"TT-26677","price":17.98,"currency_code":"USD","in_stock":true},{"title":"1500 RPM","offer_id":51138660663353,"sku":"TT-26678","price":17.98,"currency_code":"USD","in_stock":true},{"title":"2000 RPM","offer_id":51138660696121,"sku":"TT-26679","price":17.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/3358\/9049\/files\/compression-spring-performance-for-gy6-50cc-139qmb-1.jpg?v=1794376626","url":"https:\/\/www.trendtimes.com\/products\/gy6-50cc-139qmb-compression-spring-performance","provider":"Trend Times Toy Stores","version":"1.0","type":"link"}