2001 Yamaha YFM660 Raptor Factory Service Manual, Page 302Get this manual
CHARGING SYSTEM ELEC
Start the engine and accelerate to about 5,000 rminCharging voltage: 14 at 5,000 rmin OUT OF SPECIFICATION MEETS SPECIFICATION
The charging circuit is not faulty
EB804012
4.Charging coil resistance
Disconnect the AC magneto coupler from the wire harnessConnect the pocket tester1) to the charging coilsTester (+) lead White terminal Tester () lead White terminal Tester (+) lead White terminal Tester () lead White terminal Tester (+) lead White terminal Tester () lead White terminal OUT OF SPECIFICATION