NCY Performance Valve Spring Set | Genuine & GY6 125-170cc clutch Also fits 139QMB-based 50cc /
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Description
NCY Performance Valve Spring Set Genuine & GY6 125 170cc clutch Also fits 139QMB based 50cc Also fits 139QMB based 50cc 80cc engines with the following engine codes: 139QMA Thread Size (spline side): M12x1 BN161QMK A Upgrade your valve train with the NCY Performance Valve Spring Set