2007 Yamaha Apex Factory Service Manual, Page 264Get this manual

2007 Yamaha Apex Factory Service Manual, Page 264

LIGHTING SYSTEM TAIL LIGHT DOES NOT COME ON Check the tailbrake light bulb(s)OK NO CONTINUITY Replace the tailbrake light
Replace andor charge the batteryRefer to "BATTERY INSPECTION" in CHAPTER 2Replace the stator coil and pickup coil assembly
Check the stator coil and pickup coilOK OUT OF SPECIFICATION Check the main switchRefer to "IGNITION SYSTEM"OK FAULTY Replace