Yamaha YB50 Service Manual page 137

5. Pick up coil resistance
• Disconnect the Pick up coil coupler of the
installation
• Connect the pocket tester (Ωx100) on the
pick up coil terminal.
Cable (+) of tester
Cable (–) of tester
• Check if the pick up coil has the specified
resistance.
Resistance of harnessing coil
250 ~ 370 Ω at 20 °C (68 °F)
6. Connections
Check the connections throughout the igni-
tion system for connections.
Consult the "ELECTRICAL DIAGRAM"sec-
tion
Replace the CDI unit.
IGNITION AND STARTER SYSTEM
White blue
Black
SATISFIES
THE SPECIFIED VALUE
CORRECT
OUTSIDE SPECIFIED VALUE
The pick up coil is defective, replace it
7-7
ELEC
Correct