Generic TR 125 Service Manual page 79

* Attention
Install spark plug on the head of cylinder.
Check in the condition of normal
compression pressure
Disassemble 4P、2P joints of CDI group.
Connect high pressure shunt between 2P (red/white side) and 4P (black side).
Button start motor or step on actuating lever to measure the maximum voltage of charging coil.
Connection method: connect red/white with negative pole and black with black pole
Minimum voltage: more than 95V
*Attention
Fingers can not touch metal part of test
stick when measuring voltage. Special
attention should be taken when electric
Black
黑
shock may happen
蓝/白
Blue/ White
When the maximum voltage of CDI group terminal is
abnormal, disassemble alternator joints.
Connect shunt with charging coil (red/white)
•When voltage is abnormal in CDI group while normal in alternator, joint is in bad contact or wiring is broken.
•That both are abnormal indicates badness of charging coil. Please refer to the check of charging coil meter.
6.3.3 Trigger
* Attention
Inspect when spark plug is installed on the
cylinder head and compression pressure is
normal.
Disconnect connector 4P from CDI assembly. A peak-voltage shunt is indirectly connected to the 4P connector
(black terminal) and 4P wiring-terminal connector of trigger (blue/white terminal). Press starting motor button
or kick pedal level to measure primary peak voltage of trigger.
Connecting method: positive (+) to blue/white, negative (-) to black.
Min. voltage: higher than 1.7V.
* Attention
Please do not touch the metal parts of
testing probe with your fingers while
Blue/ White
measuring the voltage, or you will be
shocked. Please take care.
When the peak voltage measured at connector of CDI assembly
is abnormal, take down the protecting plate on the right side of
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