Spark Gap Test; Couplers, Leads And Ignition Coil Connection Inspection; “Engine Stop” Button Inspection - Yamaha WR450F(V) Owner's Service Manual

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É
a
IGNITION SYSTEM

SPARK GAP TEST

1. Disconnect the ignition coil from spark
plug.
2. Remove the ignition coil cap.
3. Connect the dynamic spark tester 1 (igni-
tion checker 2) as shown.
• Ignition coil 3
• Spark plug 4
È For USA and CDN
É Except for USA and CDN
4. Kick the kickstarter.
5. Check the ignition spark gap.
6. Start engine, and increase spark gap until
misfire occurs. (for USA and CDN only)
Minimum spark gap:
6.0 mm (0.24 in)
COUPLERS, LEADS AND IGNITION COIL
CONNECTION INSPECTION
1. Check:
• Couplers and leads connection
Rust/dust/looseness/short-circuit →
Repair or replace.
• Ignition coil and spark plug as they are fit-
ted
Push in the ignition coil until it closely
contacts the spark plug hole in the cylin-
der head cover.
EC625001
"ENGINE STOP" BUTTON INSPECTION
1. Inspect:
• "ENGINE STOP" button conduct
Tester (+) lead → Black lead 1
Tester (–) lead → Black lead 2
PUSH IN
FREE
No continuity while being pushed → Replace.
Continuity while being freed → Replace.
2. Inspect:
• Rubber part a
Tears/damage → Replace.
6 - 4
–
ELEC
B B Tester selec-
1 2
tor position
Ω × × × × 1
+