2001 Yamaha YFM660 Raptor Factory Service Manual, Page 301Get this manual
CHARGING SYSTEM EB804010
TROUBLESHOOTING IF THE BATTERY IS NOT CHARGED:
Procedure Check: 1.Fuse 2.Battery 3.Charging voltage
4.Charging coil resistance 5.Wiring connections (the entire charging system)
OTE: Remove the following part(s) before troubleshooting: 1)Seat Use the following special tool(s) for troubleshooting
Pocket tester: PNYU-03112, 90890-03112
EB802011