i will try to gather as much info on the YZF R125 electrical wiring systems as possible here in this post.
other posts of interest
Yamaha YZF R125 testing injector
Yamaha YZF R125 fuel injection system
Yamaha YZF R125 testing ignition coil
Yamaha YZF R125 radiator fan operation , resistance
Yamaha YZF R125 engine management , fault codes
Yamaha YZF R125 , Yamaha FI diagnostics Tool Scanner Machine
Yamaha YZF R125 testing the generator , alternator , stator rotor .
Yamaha YZF R125 Pick up coil testing
How to test motorcycle relays
Yamaha YZF R125 will not start no spark diagnostics
Testing the Charge of a battery
Test battery at the negative and positive terminals
If you have a voltage meter you can do some basic tests.When the engine has been off for at least 1-2 hours with ignition key turned off,
100% Charged 12.60 to 12.8v
75% Charged 12.4v
50% Charged 12.1v
25% Charged 11.9v
0% Charged less than 11.8v
see more Yamaha YZF R125 blog posts
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