Yamaha TT-R125EY Service Manual page 244

IGNITION SYSTEM
2. Inspect:
• Secondary coil resistance
Out of specification → Replace.
Tester (+) lead → Spark plug lead 1
Tester ( _ ) lead → Orange lead 2
TIP
When inspecting the secondary coil resistance,
remove the spark plug cap.
CDI MAGNETO INSPECTION
1. Inspect:
Br G
R W • Pickup coil resistance
Out of specification → Replace.
1 2
Tester (+) lead → Red lead 1
Tester ( _ ) lead → White lead 2
6-5
ELEC
Secondary coil
Tester selector
resistance position
6.3 ~ 9.5 kΩ at
20 °C (68 °F)
Pickup coil
Tester selector
resistance position
Ω
248 ~ 372 at
Ω
20 °C (68 °F)
– +
kΩ x 1
x 100