Pulser And Charge Coil; C.d.1. Unit - Yamaha BR250F Service Manual

Inspection
Instruct the rider to:
1. Inspect the clean the spark plug every
400 km (250 mi) or 20 hours.
2. Clean the electrodes of carbon and
adjust the electrode gap.
3. Be sure to use the proper reach plug to
avoid overheating, fouling, or piston
damage.
Spark plug type: NGK BR8HS
Spark plug gap (use wire gap gauge):
0.6 - 0.7 mm (0.023 - 0.028 in)
Spark plug torque:
2.8 m-kg (20 ft-Ib)
G. Pulser and Charge Coil
Check the resistance of each coil as shown in
the illustartion. If the resistance is not within
specification, the coil is not working. Check
the connections. If the connections are good,
the coil is damaged internally; it should be
replaced.
Pocket tester: 90890-03112
Charging coil resistance:
Black to Brown leads:
426Q
±
10% at 20°C (68° F)
Pulser coil resistance:
Black to White/Red leads:
20Q
±
10% at 20°C (68° F)
1. Yellow
2. Brown
3. Black
4. White/Red
5. Flywheel magneto
6. Pocket tester
7. Set tester at "RX1" position
®
426Q (Charge Coil)
(Pulser Coil)
20Q
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Pulser Coil - - - -
Charge Coil--
H. C.D.1. Unit
If the ignition system malfunctions and all of
the above components are working properly,
then the C.D.1. unit is faulty; replace it.
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