Generic TR 125 Service Manual page 27

Check the burning, pollution and carbon deposit of spark plug.
If the conditions above happen, please clear with spark plug scavenger or steel brush.
Clearance inspection of spark plug
Gap: 0.7-0.8mm
CR8E (NGK)
Spark plug type:
Spark plug gap
*Attention
When installing spark plug, you'd better
install with hands and then use spark plug
sleeve to tighten.
Storage battery
Disassembly of storage battery
Open seat cushion
Disassemble gusset plate of right and left fuel tank
backplate.
Disassemble air filter cover
Disassemble negative wire first and then the positive one.
Take out storage battery.
Storage battery
Warning!
During positive lead wire disconnection, be
sure to prevent the tools being used from
touching the frame; or it will result in short
circuit sparks, which may ignite gasoline and
damage battery. It is dangerous!
Install the battery in reverse order of removal.
Warning!
To avoid short circuit, please connect positive
(+) lead wire first, then the negative (-) lead
wire.
Check of the charging state (closed circuit
voltage)
Open seat cushion
Open roof cover of air filter; disassemble joint wire of storage
battery.
Measure the battery voltage using a voltmeter.
Fully charged: 13.1V
Undercharge: 12.3V
* Attention
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