Yamaha YBR125 Custom, Service Manual

Page: 195 / 218

Starting system
ELEC
3.Measure
The depth of mica sheet slot a
Out of normal range
→ grind it with hand saw to make
it fits to normal value.
Depth of the mica slot
1.5mm
The insulated mica sheet of commutator must has
slot ,which can sure the normal work of the com-
mitator.
Note:
4.
**********************************
Check
Electric coil(insulation,conduction)
If there is default
→ replace the starting motor
Connect min.multitester for the test of conduction and
insulatiom
Measure the resistance value of the electric button.
**********************************
5.
If the resistance value is abnormal,replace the starting mot
Measure
Electric brush length a
Out of normal value
→ Replace the electric brush as a se
Inspection procedure
********
Resistance value of electric button coil
Conduction test
0.017~0.021 Ω ,at 20°C 68 F
Insulation test
more than 1M Ω at 20 °C 68 F
Lengh limit value of the electric brush
3.5mm(0.14in)
********
t
When replacing the electric brush, pay more atte-
ntion to one side which is welding.
Note:
7-19