Yamaha YZ450FT Automobile User Manual


 
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ELEC
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 kick starter.
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)
È
É
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
No continuity while being pushed Replace.
Continuity while being freed Replace.
Tester (+) lead
Black/White lead
1
Tester () lead
Black lead
2
B/W
1
B
2
Tester selec-
tor position
PUSH IN
×
1
FREE
B/WB
1
1
2
2