Yamaha TT-R90 2005 Service Manual page 346

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

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Tt-r90v 2005Tt-r90ev 2005Tt-r90e 2005

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