The Racing Reed Valve Kit -Suitable for 40mm and 32mm Intake -2In1- 66cc/80cc Gas Motorized Bicycle.
Length Of Neck( Reed Valve):1.65 Inch Max and 1.06 Inch Mini;Inner and Out Dia of Neck(Reed Valve):0.63inch and 0.75inch, Carbon Fiber Petals
It Works Well on Normal Piston and Cylinder, Better Performance If Works with Windowed Piston.
No Need Special Cylinder.
Package Including 4pcs Small Washers to Steel Plate.