101 Octane Membrane Round 20mm For Benzhou YY50QT-15 50 4T 2007-2014\n\n(Please Check The Compatibility As The Product Fits Several Bikes)\n\nNote : 20mm\n\nA YY50QT-15 50 4T membrane (or carburetor diaphragm) round 20mm is a flexible, precision-molded rubber component essential for the operation of Constant Velocity (CV) carburettors on your Benzhou YY50QT-15 50 4T. Its primary function is to operate the carburetor's slide valve, which regulates the flow of air into your Benzhou's engine. As the engine demands more air, vacuum pressure lifts the membrane, which in turn lifts the slide valve, adjusting the air-fuel mixture to match the engine's speed and load. This ensures smooth, consistent power delivery across all RPM ranges of your motorcycle.\n\nYou should consider replacing the membrane round 20mm if you notice symptoms like sluggish acceleration, poor throttle response, or general loss of power in your Benzhou. Over time, the rubber material can harden, crack, or tear, preventc