Check your source and pickup coil. Unplug cdi connector this has four wires two are solid colors brown an black two white/green an white/red hook ohmmeter between black an brown wire this is the source coil reading should be between 428-523 ohms pickup coil is white/green white/red189-231ohmsif either side has no reading you have to change the stator this was what was wrong with the one I have