{"product_id":"spring-1500-rpm-compression-torque-spring-gy6-150cc-157qmj-ncy-brand","title":"NCY 1500 RPM Yellow Contra Spring - GY6 125cc-171cc","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\u003cp\u003eThis \u003cstrong\u003eNCY 1500 RPM Yellow Contra Spring\u003c\/strong\u003e is a performance compression (torque) spring for the rear clutch pulley on GY6 125cc to 171cc scooters, based on the Honda GY6 design. It's stiffer than stock, so it holds more pressure on the belt and makes the CVT shift up at a higher RPM, keeping the engine closer to its power band for harder acceleration.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1500 RPM rating:\u003c\/strong\u003e Yellow NCY spring, a step up from a stock spring for performance tuning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLess belt slip:\u003c\/strong\u003e Extra side pressure on the belt helps it grip under hard acceleration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigher shift point:\u003c\/strong\u003e Holds the lower ratio longer so the engine revs into its power band.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in Taiwan:\u003c\/strong\u003e Built by NCY.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 1200-1027\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e 660A09GY615\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 812722022921\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRPM rating:\u003c\/strong\u003e 1500 RPM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Yellow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWire diameter:\u003c\/strong\u003e 4.2mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner diameter:\u003c\/strong\u003e 48.5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree length:\u003c\/strong\u003e 154.0mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e NCY\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003eFits GY6 125cc to 171cc engines (based on the Honda GY6 design) with these engine codes:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eEngine code\u003c\/th\u003e\n\u003cth\u003eEngine code\u003c\/th\u003e\n\u003cth\u003eEngine code\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e152QMI\u003c\/td\u003e\n\u003ctd\u003e157QMJ\u003c\/td\u003e\n\u003ctd\u003e161QMK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1P57QMJ\u003c\/td\u003e\n\u003ctd\u003e1P61QMK\u003c\/td\u003e\n\u003ctd\u003eYN1P57QMJ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJJ157QMJ\u003c\/td\u003e\n\u003ctd\u003eBN157QMJ\u003c\/td\u003e\n\u003ctd\u003eBN161QMK-A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003eAlso fits the Genuine Buddy 125, 150 and 170i and many GY6 125-150cc scooters from brands like SYM, Wolf, Ice Bear, Jonway, TaoTao, ZNEN, Bintelli and BMS. Check the engine code stamped on your engine case to confirm fit.\u003c\/p\u003e\u003ch3\u003eUsage Tips\u003c\/h3\u003e\u003cp\u003eA contra spring does two jobs: it squeezes the belt to stop slip, and it sets the RPM where the CVT starts shifting to a taller ratio. For the best acceleration, match that shift RPM to your engine's peak power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStiffer spring:\u003c\/strong\u003e More belt grip and a higher shift RPM.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSofter spring:\u003c\/strong\u003e Less belt grip and a lower shift RPM.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eUse a clutch spring compressor tool when installing.\u003c\/p\u003e\u003cp\u003eThis product is intended for off-road use only. This product is not intended for use on public roads or land.\u003c\/p\u003e\u003ch2\u003eProduct Diagrams\u003c\/h2\u003e\u003cul class=\"az-content-resources\"\u003e\u003cli\u003e\n\u003ca href=\"\/search?view=az-assembly\u0026amp;q=249\"\u003eGY6 DRIVEN PULLEY\u003c\/a\u003e \u003cspan\u003eCallout 4\u003c\/span\u003e\n\u003c\/li\u003e\u003c\/ul\u003e","brand":"NCY","offers":[{"title":"Default Title","offer_id":67964531704129,"sku":"1200-1027","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/NCY_1500_rpm_Contra_spring.jpg?v=1792793648","url":"https:\/\/azscooterparts.com\/products\/spring-1500-rpm-compression-torque-spring-gy6-150cc-157qmj-ncy-brand","provider":"AZScooterParts","version":"1.0","type":"link"}