Carburetor Heating System - Yamaha TT-R90(N) Owner's Service Manual

CARBURETOR HEATING SYSTEM

INSPECTION STEPS
Use the following steps for checking the possibility of the malfunctioning carburetor heating system.
Check entire carburetor
heating system for connec-
tion.
Check thermo switch.
Check carburetor heater.
Check CDI magneto.
Replace rectifier/regulator.
NOTE:
Remove the following parts before inspection.
1) Seat
2) Fuel tank
Use the following special tools in this inspection.
Pocket tester:
YU-3112-C/90890-03112
CARBURETOR HEATING SYSTEM
OK
OK
OK
Source coil
OK
No good
No good
No good
No good
6 - 6
– +
ELEC
Repair or replace.
Replace.
Replace.
Replace.