{"product_id":"ncy-compression-spring-performance-139qmb","title":"NCY Compression Spring (Performance); 139QMB","description":"\u003cp\u003eNCY compression spring for 50cc 139QMB engines. Available in 1k, 1.5k, and 2k rpms. Compression springs do a couple of things. First they supply the pressure to engage the belt. They also determine the rate at which the CVT transmission changes from low to high gear. A 1000rpm spring will go into a higher gear than a 2000rpm spring. Specifications: Wire Diameter: 4.0mm Inner Diameter: 49.0mm Length: 106.0mm Available in 1k, 1.5k, and 2k rpms 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. About NCY: NCY is the aftermarket performance parts leader for most popular scooter brands including Honda, Yamaha, Genuine, Vespa, SYM, Lance, KYMCO, and GY6 \/ QMB powered scooters. Made in Taiwan with strict quality standards since 1997, NCY is ISO 9001 certified.\u003c\/p\u003e","brand":"ncy","offers":[{"title":"Default Title","offer_id":48045130023099,"sku":"1200-1053 1000 RPM","price":19.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0719\/1340\/6651\/files\/1200-1053_e8cc059f-0a41-4ab0-9bb5-ec41e89fb04f.jpg?v=1783052468","url":"https:\/\/thriftyscooters.com\/products\/ncy-compression-spring-performance-139qmb","provider":"Thrifty Scooters","version":"1.0","type":"link"}