{"product_id":"ssp-g-gy6-performance-clutch-drum-12-spoke-169-537","title":"SSP-G GY6 Performance Clutch Drum - 12 Spoke","description":"\u003ch2\u003eCooling Under Pressure: SSP-G 12-Spoke Performance Clutch Bell\u003c\/h2\u003e\u003cp\u003eEliminate clutch fade and improve take-off consistency with the \u003cstrong\u003eSSP-G 12-Spoke Performance Clutch Drum\u003c\/strong\u003e. Engineered for 125cc to 170cc \u003cstrong\u003eGY6 engines\u003c\/strong\u003e, this high-performance bell features a specialized 12-spoke vented design. This open architecture drastically improves airflow within the CVT case, allowing heat to escape rapidly and preventing the clutch pads from \"glazing\" during aggressive stop-and-go riding or off-road use.\u003c\/p\u003e\u003ch3\u003eTechnical Performance Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVented 12-Spoke Design:\u003c\/strong\u003e Maximizes heat dissipation to keep clutch temperatures low, ensuring a consistent bite and preventing power-robbing slip.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Balanced:\u003c\/strong\u003e CNC-machined to exacting tolerances to eliminate high-RPM vibration, protecting your final drive bearings and ensuring a smooth power delivery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Friction Surface:\u003c\/strong\u003e The internal drum surface is optimized for rapid engagement, reducing \"shudder\" during low-speed take-offs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal GY6 Compatibility:\u003c\/strong\u003e Features a standard 19-spline interface, making it a direct-fit upgrade for nearly all 150cc-based 4-stroke scooters, ATVs, and karts.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003eComprehensive Fitment Guide\u003c\/h3\u003e\u003cp\u003eThis performance drum is a direct replacement for \u003cstrong\u003e125cc \/ 150cc \/ 170cc\u003c\/strong\u003e engines with the following codes:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eEngine Codes\u003c\/th\u003e\n\u003cth style=\"text-align: left;\"\u003eCompatibility Status\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eQMJ \/ QMI Series\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e157QMJ, 152QMI, 1P57QMJ, 161QMK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePerformance Variants\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYN1P57QMJ, BN157QMJ, JJ157QMJ, BN161QMK-A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFitment Note\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCompatible with any 125cc+ engine code containing \"QM\" or \"FM\".\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003chr\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner Diameter:\u003c\/strong\u003e 125mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Diameter:\u003c\/strong\u003e 136mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Splines:\u003c\/strong\u003e 19\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline Diameter:\u003c\/strong\u003e 13.5mm (Peak) \/ 15mm (Valley)\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003cblockquote\u003e\n\u003cstrong\u003eMechanic's Note:\u003c\/strong\u003e Heat is the #1 killer of GY6 clutches.\u003c\/blockquote\u003e\u003cblockquote\u003e\n\u003cstrong\u003ePerformance Tip:\u003c\/strong\u003e If you notice your scooter \"shaking\" or losing power on take-off after it gets hot, your stock bell is likely trapped heat and glazing the pads.\u003c\/blockquote\u003e\u003cblockquote\u003e\n\u003cstrong\u003eInstallation Tip:\u003c\/strong\u003e When installing this new bell, always use a \u003cstrong\u003e\u003ca href=\"https:\/\/www.scooterworks.com\"\u003eClutch Holding Tool\u003c\/a\u003e\u003c\/strong\u003e to torque the nut to factory specs; never use an impact wrench alone, as it can deform the splines!\u003c\/blockquote\u003e\u003cp style=\"font-size: 0.85em; color: #666;\"\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e 169-537 \u003cbr\u003e\u003cstrong\u003eVendor:\u003c\/strong\u003e SSP-G (Taiwanese Sourced)\u003c\/p\u003e","brand":"SSP-G","offers":[{"title":"Default Title","offer_id":48112440246459,"sku":"169-537","price":50.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0719\/1340\/6651\/files\/648282.jpg?v=1784317925","url":"https:\/\/thriftyscooters.com\/products\/ssp-g-gy6-performance-clutch-drum-12-spoke-169-537","provider":"Thrifty Scooters","version":"1.0","type":"link"}