Spark Gap Test; Couplers And Leads Connection Inspection; "Engine Stop" Button Inspection - Yamaha YZ250(R)/LC Owner's Service Manual

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B
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.
9 Spark plug cap 3
9 Spark plug 4
A For USA and CDN
B 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)
EC624000
COUPLERS AND LEADS CONNECTION
INSPECTION
1. Check:
9 Couplers and leads connection
Rust/ Dust/
Repair or replace.
EC625002

"ENGINE STOP" BUTTON INSPECTION

1. Inspect:
9 "ENGINE STOP" button conduct
Tester (+) lead ¡ Black/White lead 1
Tester (–) lead ¡ Black lead 2
PUSH IN
FREE
Not continuous while being pushed ¡ Replace.
Continuous while being freed ¡ Replace.
6-3
ELEC
Looseness/Short-circuit
B/W B Tester selec-
1 2
tor position
Ω × 1
¡