Yamaha TT-R50E Owner's Service Manual page 384

CARBURETOR HEATING SYSTEM
W Sb
Y B
2
1
6 - 19
AC MAGNETO INSPECTION
1. Inspect:
• Lighting coil resistance
Out of specification → Replace.
Tester (+) lead → Yellow lead 1
Tester (–) lead → Black lead 2
Lighting coil
resistance
0.8 ~ 1.20 Ω at
20 °C (68 °F)
– +
ELEC
Tester selector
position
Ω × 1