Yamaha DT200L 1984-1988 Service Manual page 205

COOLING SYSTEM
ELEC
Aforementioned circuit diagram shows cooling
circuit in wiring diagram.
NOTE:
For the encircled numbers and color codes, see
page 7-3.
(g)
G3) Thermo-unit
(4) Temperature gauge
Main switch
Fuse
Battery
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7-31