Yamaha TT-R90E Owner's Service Manual page 298

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