Adjustable DC Fired Racing CDI Ignition Unit. GY6, Quad 50cc to 400cc

Will work with Chinese / Taiwanese 139QMA, QMB, GY6 engines, plus many more. 6 Pin CDI Ignition Unit with Adjustable Ignition Timing Advance. (DC Fired). The maximum timing advance can be retarded or advanced allowing you to tune the CDI.