Yamaha KT100SEC Owner's Service Manual page 18

ELECTRICAL
NOTE:
Since MF batteries are sealed, it is not possible
to check the charge state of the battery by
measuring the specific gravity of the electrolyte.
Therefore, the charge of the battery has to be
checked by measuring the voltage at the battery
terminals.
1. Remove:
Battery lead
●
(from battery terminal)
CAUTION:
First, disconnect the negative battery lead
and then the positive battery lead
2. Remove:
Battery
●
3. Measure:
Battery charge
●
a. Connect the digital circuit tester
battery terminals.
Digital circuit tester
90890-03174
Tester positive probe
●
Tester negative probe
●
3-6
INSP
ADJ
.
to the
→Battery positive terminal
→Battery negative terminal
,