{"product_id":"polini-clutch-spring-set-honda-dio-qmb-139","title":"Polini Clutch Spring Set | Honda Dio 139QMB Vespa 50cc","description":"\u003cp\u003eFine-tune your launch performance and eliminate sluggish low-end takeoff with the genuine \u003cstrong\u003ePolini Clutch Spring Tuning Set\u003c\/strong\u003e. Designed to fit original factory clutches on 50cc scooters, this complete tuning kit allows you to adjust your clutch engagement RPM to match modified exhausts, big bore cylinders, or sport CVT setups—ensuring your engine revs directly into its ideal powerband before sending power to the rear wheel.\u003c\/p\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-Stage RPM Tuning Suite:\u003c\/strong\u003e Includes twelve (12) color-coded clutch springs across four distinct tension rates (ranging from 4,000 RPM to 7,000 RPM engagement) for precise transmission calibration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Holeshot \u0026amp; Acceleration:\u003c\/strong\u003e Stiffer spring rates delay shoe engagement until higher engine RPMs, launching your machine with maximum torque off the line.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Tensile Alloy Construction:\u003c\/strong\u003e Premium spring steel withstands intense thermal expansion and friction load without weakening or losing tension over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Clutch Direct Fitment:\u003c\/strong\u003e Engineered specifically for standard factory clutch shoes utilizing M28 thread clutch nuts and 39mm socket configurations.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eVehicle \u0026amp; Engine Compatibility\u003c\/h3\u003e\u003cp\u003eThis tuning spring kit is built for standard OEM 2-shoe and 3-shoe clutches across 50cc 2-stroke and 4-stroke platforms:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eEngine Family \/ Brand\u003c\/th\u003e\n\u003cth\u003eCompatible Models \u0026amp; Engine Configurations\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e139QMB \/ 1P39QMB (50cc\/80cc)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard Chinese 4-stroke platforms (TaoTao, Wolf, Ice Bear, Bintelli, Lance, Kymco, SYM). Fits engine codes with \"QM\" or \"FM\".\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGenuine Scooter Co.\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBuddy 50, Buddy 50 International, RoughHouse 50, RoughHouse 50 Sport, Brio 50i\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHonda 2T \/ 4T\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDio 50 (AF18 \/ AF27 \/ AF28 \/ AF34 \/ AF35), Lead 50, Elite 50 (SA50 models with 39mm clutch nut)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePiaggio \/ Vespa 50cc\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eZip 50, Typhoon 50, NRG, ET2, LX 50, S 50 (2-stroke \u0026amp; 4-stroke models)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eClutch Nut Verification:\u003c\/strong\u003e This spring kit fits stock\/OEM clutch assemblies with an M28 thread holding nut and 39mm rear pulley socket. It will not fit oversized 107mm or 110mm aftermarket racing clutches.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e 12 total springs (3 springs per color \/ 4 tension levels)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngagement Range:\u003c\/strong\u003e 4,000–7,000 RPM tuning levels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClutch Nut \/ Socket:\u003c\/strong\u003e M28 thread \/ 39mm socket size\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e 245.030\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 1200-1218\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrigin:\u003c\/strong\u003e Made in Italy\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMechanic's Tip:\u003c\/strong\u003e Use a proper clutch nut tool to safely remove the 39mm central nut. When installing, use needle-nose pliers or a spring hook to fully seat the hooks through the clutch shoe holes. Verify all three shoes retract evenly before reinstalling.\u003c\/p\u003e\u003cp\u003eCalifornia Prop 65 Warning\u003c\/p\u003e\u003ch2\u003eModel Fitment\u003c\/h2\u003e\u003cp\u003eHonda Dio 50 (AF18\/AF27\/AF28\/AF34\/AF35), Lead 50, Elite 50 SA50; Genuine Buddy 50, Buddy 50 International, Brio 50i, RoughHouse 50, RoughHouse 50 Sport; Piaggio\/Vespa Zip 50, Typhoon 50, NRG, ET2, LX 50, S 50; 139QMB\/QMA 50cc–80cc engines (fits any engine code with QM or FM)\u003c\/p\u003e","brand":"Polini","offers":[{"title":"Default Title","offer_id":67964626829633,"sku":"1200-1218","price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1011\/7785\/2225\/files\/az-p012-9301-0-1200-1218_68cded66-ae49-4cd8-8fe6-bf70c8270e22.jpg?v=1792558016","url":"https:\/\/azscooterparts.com\/products\/polini-clutch-spring-set-honda-dio-qmb-139","provider":"AZScooterParts","version":"1.0","type":"link"}