{"product_id":"rdln-turbo-high-flow-cooling-fan-qmb-gy6-1100-1556","title":"RDLN Turbo High Flow Cooling Fan - QMB \u0026 GY6","description":"\u003cp\u003ePrevent destructive thermal drop, heat fade, and oil breakdown with the premium \u003cstrong\u003eRDLN Turbo High-Flow Cooling Fan Assembly\u003c\/strong\u003e. Engineered specifically as a performance upgrade for air-cooled 4-stroke small-displacement scooter blocks, this lightweight (56g) fan utilizes an aggressive, swept-blade turbine geometry. By significantly accelerating the cubic feet per minute (CFM) of air forced through your engine’s plastic cooling shrouds, it lowers cylinder head temperatures to maintain maximum combustion efficiency and stable horsepower output during hot summer idling or pinned, full-throttle urban commuting.\u003c\/p\u003e\u003ch3\u003eAdvanced Thermodynamic Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngineered High-Volume Pulley Sweep:\u003c\/strong\u003e Reshaped fins draw radically more cool air over the engine's cooling fins compared to flat, shallow factory impellers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-Lightweight 56-Gram Rotational Mass:\u003c\/strong\u003e Minimizes parasitic drag on the crankshaft flywheel taper, encouraging crisper throttle response and faster engine revving.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Heat Resistance:\u003c\/strong\u003e Molded from structurally stable composite polymer matrices engineered to resist warping, blade deflection, and high-RPM cracking.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003eComprehensive Engine Code Matrix\u003c\/h3\u003e\u003cp\u003eThis fan is a \u003cstrong\u003euniversal 4-point mounting upgrade\u003c\/strong\u003e tailored to standard air-cooled engines.  \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThis upgraded cooling component directly swaps onto all air-cooled 50cc–232cc scooter, ATV, and go-kart platforms with stator-mounted cooling fans.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eCommon 139QM\/FM-Based 50cc to 80cc Platforms\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eEngine Family\u003c\/th\u003e\n\u003cth style=\"text-align: left;\"\u003eCompatible Engine Codes \/ Stamped Casting Identifiers\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e139QMB \/ 139QMA\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e139QMA | 139QMB | 1P39QMB | 1P39QMA-2 | YN139QMB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlternative Blocks\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eJJ1P39QMB | 139FMA-2 | BD1P39QMB | BN139QMB | 147QMD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\u003ch4\u003eCommon 157QM\/FM-Based 125cc to 200cc Platforms\u003c\/h4\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eEngine Family\u003c\/th\u003e\n\u003cth style=\"text-align: left;\"\u003eCompatible Engine Codes \/ Stamped Casting Identifiers\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGY6 Large Case\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e157QMJ | 161QMK | 152QMI | 1P61QMK | 1P57QMJ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlternative Blocks\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYN1P57QMJ | 1P52FMI | 154FMI | JJ157QMJ | BN157QMJ | BN161QMK-A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e \u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Diameter Dimension:\u003c\/strong\u003e 4.65 Inches x 4.65 Inches (118mm x 118mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Fan Profile Height:\u003c\/strong\u003e 1.17 Inches (30mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNet Structural Weight:\u003c\/strong\u003e 56 Grams\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Alignment:\u003c\/strong\u003e Standard 4-Point Stamped Flywheel Boss Pattern\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 1100-1556\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003cp style=\"font-size: 0.85em; color: #666;\"\u003e\u003cstrong\u003eSKU:\u003c\/strong\u003e 1100-1556 \u003cbr\u003e\u003cstrong\u003eVendor:\u003c\/strong\u003e RDLN \u003cbr\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003ca href=\"https:\/\/www.P65Warnings.ca.gov\"\u003eCalifornia Prop 65 Warning: www.P65Warnings.ca.gov\u003c\/a\u003e\u003c\/p\u003e","brand":"RDLN","offers":[{"title":"Default Title","offer_id":49244788228376,"sku":"1100-1556","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/1728\/1816\/files\/1100-1556.webp?v=1740776100","url":"https:\/\/www.scooterworks.com\/products\/rdln-turbo-high-flow-cooling-fan-qmb-gy6-1100-1556","provider":"Scooterworks USA, LLC","version":"1.0","type":"link"}