RDLN Turbo High Flow Cooling Fan - QMB & GY6
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Prevent destructive thermal drop, heat fade, and oil breakdown with the premium RDLN Turbo High-Flow Cooling Fan Assembly . 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. Advanced Thermodynamic Features Engineered High-Volume Pulley Sweep: Reshaped fins draw radically more cool air over the engine's cooling fins compared to flat, shallow factory impellers. Ultra-Lightweight 56-Gram Rotational Mass: Minimizes parasitic drag on the crankshaft flywheel taper, encouraging crisper throttle response and faster engine revving. Heavy-Duty Heat Resistance: Molded from structurally stable composite polymer matrices engineered to resist warping, blade deflection, and high-RPM cracking. Comprehensive Engine Code Matrix This fan is a universal 4-point mounting upgrade tailored to standard air-cooled engines. This upgraded cooling component directly swaps onto all air-cooled 50cc–232cc scooter, ATV, and go-kart platforms with stator-mounted cooling fans. Common 139QM/FM-Based 50cc to 80cc Platforms Engine Family Compatible Engine Codes / Stamped Casting Identifiers 139QMB / 139QMA 139QMA | 139QMB | 1P39QMB | 1P39QMA-2 | YN139QMB Alternative Blocks JJ1P39QMB | 139FMA-2 | BD1P39QMB | BN139QMB | 147QMD Common 157QM/FM-Based 125cc to 200cc Platforms Engine Family Compatible Engine Codes / Stamped Casting Identifiers GY6 Large Case 157QMJ | 161QMK | 152QMI | 1P61QMK | 1P57QMJ Alternative Blocks YN1P57QMJ | 1P52FMI | 154FMI | JJ157QMJ | BN157QMJ | BN161QMK-A Technical Specifications Overall Diameter: 4.65 in x 4.65 in (118mm x 118mm) Total Fan Profile Height: 1.17 in (30mm) Net Weight: 56 grams Mounting: Standard 4-Point Stamped Flywheel Boss Pattern California Prop 65 Warning: www.p65warnings.ca.gov
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