Yamaha TT-R90S Manuel D'atelier Du Proprietaire page 336

ELECTRIC STARTING SYSTEM (TT-R90E)
1
B
START SWITCH INSPECTION
2
1. Inspect:
Start switch continuity
G
B
Tester (+) lead → Black lead 1
Tester (–) lead → Black lead 2
PUSH IN
FREE
No continuous while being pushed → Replace.
Continuous while being freed → Replace.
6 - 11
–
ELEC
Tester selec-
B B
tor position
1 2
Ω × 1
+