Yamaha TT-R90(T) - Page 320

6 - 4
– +
ELEC
IGNITION SYSTEM
EC622001
SPARK GAP TEST
1. Disconnect the spark plug cap from spark
plug.
2. Connect the dynamic spark tester 1
(ignition checker 2) as shown.
● Spark plug cap 3
● Spark plug 4
Å For USA and CDN
ı Except for USA and CDN
3. Kick the kick starter.
4. Check the ignition spark gap.
5. Start engine, and increase spark gap until
misfire occurs. (for USA and CDN only)
Minimum spark gap:
6.0 mm (0.24 in)
Å
ı
EC624000
COUPLERS AND LEADS CONNECTION
INSPECTION
1. Check:
● Couplers and leads connection
Rust/dust/looseness/short-circuit →
Repair or replace.
MAIN SWITCH INSPECTION (TT-R90E)
1. Inspect:
● Main switch continuity
Check for continuity as follows:
Incorrect continuity → Replace.
Tester (+) → Red lead 1
Tester (–) → Brown lead 2
Continuous
Tester (+) →
Black/White lead 3
Tester (–) → Black lead 4
Continuous
R
1
Br
2
B/W
3
B
4
Tester selec-
tor position
ON
Ω × 1
OFF
B/W
Br
R
B
1
3
2
4