Yamaha WR450F(T) Owner's Service Manual page 672

ELECTRIC STARTING SYSTEM
STARTER RELAY INSPECTION
1. Remove:
2. Inspect:
Battery (+) lead →
Battery (–) lead →
Tester (+) lead → Starter relay terminal 3
Tester (–) lead → Starter relay terminal 4
Continuous while not connected to the battery
→ Replace.
Not continuous while connected to the battery
→ Replace.
CLUTCH SWITCH INSPECTION
1. Inspect:
Tester (+) lead → Black lead 1
Tester (–) lead → Black lead 2
No continuous while being pulled → Replace.
Continuous while being freed → Replace.
6 - 10
• Starter relay
• Starter relay conduct
Use 12 V battery.
Starter relay terminal 1
Starter relay terminal 2
Ter-
minal
3
Con-
nected to
battery
Not con-
nected to
battery
• Clutch switch continuity
B
1
PULL
FREE
– +
ELEC
Ter-
Tester selec-
minal
tor position
4
Ω × 1
B Tester selec-
2
tor position
Ω × 1