2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 322Get this manual
IGNITION SYSTEM
C0NTINUITY
10.Chargingrotor rotation direction detection coil resistance
Disconnect the CDI magneto coupler from the wire harnessConnect the pocket tester100) to the chargingrotor rotation direction detection coil terminalTester (+) lead Red terminal Tester () lead WhiteBlue terminal 2
Check the chargingrotor rotation direction detection coil for the specified resistanceRotor ratation direction sensing coil resistance: 0.1040.127 at 20 (68 F) (Red WhiteBlue) MEETS SPECIFICATION