2003 YAMAHA TTR125 charging

SPEC
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MAINTENANCE SPECIFICATIONS
EC212300
ELECTRICAL
Item Standard Limit
CDI:
Magneto-model (stator)/manufacturer 5HP-01/YAMAHA ----
Charging coil resistance (color) 688 ~ 1,032 Ω at 20 ˚C (68 ˚F)
(Green-Brown)----
Pickup coil resistance (color) 248 ~ 372 Ω at 20 ˚C (68 ˚F)
(White-Red)----
CDI unit-model/manufacturer 5HP-00/YAMAHA ----
Ignition coil:
Model/manufacturer 4KJ-10/YAMAHA ----
Minimum spark gap 6 mm (0.24 in) ----
Primary coil resistance 0.18 ~ 0.28 Ω at 20 ˚C (68 ˚F) ----
Secondary coil resistance 6.3 ~ 9.5 kΩ at 20 ˚C (68 ˚F) ----
Part to be tightened Thread size Q’tyTightening torque
Nm m•kg ft•lb
Pickup coil M6 × 1.0 2 10 1.0 7.2
Blind plug (neutral switch) M10 × 1.25 1 20 2.0 14
Stator M6 × 1.0 3 10 1.0 7.2
Rotor M12 × 1.25 1 80 8.0 58
Ignition coil M6 × 1.0 2 7 0.7 5.1

–+ELEC
6 - 2
IGNITION SYSTEM
EC620000
IGNITION SYSTEM
INSPECTION STEPS
Use the following steps for checking the possibility of the malfunctioning engine being attributable to
ignition system failure and for checking the spark plug which will not spark.
*marked: Only when the ignition checker is used.
NOTE:
Remove the following parts before inspection.
1) Seat
2) Fuel tank
Use the following special tools in this inspection.
Spark gap test*Clean or replace
spark plug.
Check entire ignition
system for connection.Repair or replace.
Check engine stop switch. Replace.
Check ignition coil. Primary coil Replace.
Secondary coil Replace.
Check CDI magneto. Pickup coil Replace.
Charging coil Replace.
Replace CDI unit.
Dynamic spark tester:
YM-34487
Ignition checker:
90890-06754Pocket tester:
YU-3112-C/90890-03112
No Spark
OK
OK
OK
OK
Spark
No good
No good
No good
No good
No good
No good

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–+ELECIGNITION SYSTEM
CDI MAGNETO INSPECTION
1. Inspect:
Pickup coil resistance
Out of specification → Replace.
Tester (+) lead → Red lead 1
Tester (–) lead → White lead 2
Pickup coil
resistanceTester selector
position
248 ~ 372 Ω at
20 ˚C (68 ˚F)Ω × 100
2. Inspect:
Charging coil resistance
Out of specification → Replace.
Tester (+) lead → Brown lead 1
Tester (–) lead → Green lead 2
Charging coil
resistanceTester selector
position
688 ~ 1,032 Ω
at 20 ˚C (68 ˚F)Ω × 100
EC628000
CDI UNIT INSPECTION
Check all electrical components. If no fault is
found, replace the CDI unit. Then check the
electrical components again.