CDHPOWERG2 Racing Reed Valve Kit 23mmCompatible with Cylinders with 40mm and 32mm Stud Spacing 2 in166CC80CC Gas Motorized Bicycle Rse

CDH-G2 REED VALVE WORKS WELL ON NORMAL PISTON AND CYLINDER, OF COURSE BETTER PERFORMANCE WITH WINDOWED PISTON., CDH-G2 Racing Reed Valve Kit 23mm intake -Suitable for cylinders with 40mm and 32mm stud spacing- 2 in1 - 66CC/80CC Gas Motorized Bicycle；, Length of neck:1.89inch max and 1.14 inch mini;, Carbon fiber petals;Inner and Out Dia of neck:20mm and 23mm, Excluding 4pcs small washers to steel plate. Any questions,please contact us firstly !we can help you solve the problem until you are satisfied.