6-3
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" (ignition checker "2") as
shown.
• Ignition coil "3"
• Spark plug "4"
A. For USA and CDN
B. Except for USA and CDN
4. Kick the kickstarter crank.
5. Check the ignition spark gap.
6. Start engine, and increase spark
gap until misfire occurs. (for USA
and CDN only)
CHECKING THE COUPLERS,
LEADS AND IGNITION COIL
CONNECTION
1. Check:
• Couplers and leads connection
Rust/dust/looseness/short-circuit
→
Repair or replace.
• Ignition coil and spark plug as
they are fitted
Push in the ignition coil until it
closely contacts the spark plug
hole in the cylinder head cover.
CHECKING THE ENGINE STOP
SWITCH
1. Inspect:
• Engine stop switch conduction
Not conductive while it is pushed
→
Replace.
Conductive while it is freed
→
Re-
place.
Set the tester selection position to
"
Ω
× 1".
CHECKING THE IGNITION COIL
1. Remove the ignition coil cap.
2. Inspect:
• Primary coil resistance
Out of specification
→
Replace.
3. Inspect:
• Secondary coil resistance
Out of specification
→
Replace.
4. Inspect:
• Sealed portion of ignition coil "a"
• Spark plug terminal pin "b"
• Threaded portion of spark plug "c"
Wear
→
Replace.
CHECKING THE CDI MAGNETO
1. Inspect:
• Pickup coil resistance
Out of specification
→
Replace.
2. Inspect:
• Charging coil 1 resistance
Out of specification
→
Replace.
Minimum spark gap:
6.0 mm (0.24 in)
Tester (+) lead
→
Black/White
lead "1"
Tester (-) lead
→
Black lead "2"
Result
Conductive (while the
engine stop switch is
pushed)
Tester (+) lead
→
Orange lead "1"
Tester (-) lead
→
Black lead "2"
Primary
coil resis-
tance
Tester se-
lector posi-
tion
0.08–0.10
Ω
at 20 °C
(68 °F)
Ω
× 1
Tester (+) lead
→
Orange lead "1"
Tester (-) lead
→
Spark plug termi-
nal "2"
Secondary
coil resis-
tance
Tester se-
lector posi-
tion
4.6–6.8
k
Ω
at 20 °C
(68 °F)
k
Ω
× 1
Tester (+) lead
→
Red lead "1"
Tester (-) lead
→
White lead "2"
Pickup coil
resistance
Tester se-
lector posi-
tion
248-372
Ω
at 20 °C (68
°F)
Ω
×100
Tester (+) lead
→
Brown lead "1"
Tester (-) lead
→
Green lead "2"
Charging
coil 1 resis-
tance
Tester se-
lector posi-
tion
720-1,080
Ω
at 20 °C
(68 °F)
Ω
×100
Summary of Contents for YZ250F(X)
Page 2: ......
Page 57: ...3 13 ENGINE INTAKE EXHAUST ...
Page 108: ...4 41 OIL PUMP 15 Rotor housing 1 Order Part name Q ty Remarks ...
Page 159: ...5 29 STEERING 9 Bearing race 2 Refer to removal section Order Part name Q ty Remarks ...
Page 168: ...5 38 REAR SHOCK ABSORBER 12 Bearing 2 Refer to removal section Order Part name Q ty Remarks ...
Page 243: ...3 13 MOTEUR ADMISSION ECHAPPEMENT ...
Page 298: ...4 44 BALANCIER 5 Replier l onglet de la rondelle frein ...
Page 384: ......
Page 439: ...3 13 MOTOR EINLASS AUSLASS ...
Page 495: ...4 45 ÖLPUMPE 15 Rotorgehäuse 1 Reihenfolge Bauteil Anz Bemerkungen ...
Page 555: ...5 38 FEDERBEIN 12 Lager 2 Siehe den Abschnitt zum Ausbau Reihenfolge Bauteil Anz Bemerkungen ...
Page 578: ......
Page 634: ...3 14 MOTORE ASPIRAZIONE SCARICO ...
Page 688: ...4 43 EQUILIBRATORE 5 Piegare la linguetta della rondella di bloccaggio ...
Page 690: ...4 45 POMPA DELL OLIO 15 Alloggiamento del rotore 1 Ordine Denominazione Quantità Osservazioni ...
Page 774: ......
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