Yamaha YBR125 Custom, Service Manual

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Inspection of socket connector
ELEC
3.Resistance of spark plug cap
Remove the spark plug cap
Connect the multitester(test frequency×1K)
to spark plug cap
4.Resistance of primary coil of ignition coil
Remark
Don't pull down the spark plug from the high-pressure
wire.
Turning in counter clockwise when removing.
Turning in clockwise when installing.
When assembling the spark plug cap,check the high
-pressure wire first.
Cut off the front end of high-pressure wire about
5mm before installing.
Resistance value of ignition coil(primary)
0.3 Ω ±10%(20°C)
Remove the high-pressure coil (ignition coil)
Connect the multitester(test frequency
Ω ×1)
to the terminal of ignition coil.
lead wire of voltage gauge → spark plug side
lead wire of voltage gauge → high-pressure wire side
out of specification
The spark plug is failure,replace it
Resistance of spark plug cap
5K ± 20%(20°C) Ω
Lead wire of voltage gauge → orange terminal
lead wire of voltage gauge → ground wire
7-9