Check the leads, couplers, and connectors for stains, rust, moisture, etc.
1. Disconnect:
2. Check:
Moisture → Dry with an air blower.
Rust/stains → Connect and disconnect several times.

3. Check:
Loose connection → Connect properly.
NOTE:
If the pin "1" on the terminal is flattened, bend it up.

4. Connect:
NOTE:
Make sure all connections are tight.
5. Check:

NOTE:
If there is no continuity, clean the terminals.
When checking the wire harness, perform steps (1) to (3).
As a quick remedy, use a contact revitalizer available at most part stores.

Circlips
Special toolsTypes of bulbs
The bulbs used on this vehicle are shown in the
illustration.
Bulbs "a" and "b" are used for the headlights
and usually use a bulb holder that must be detached
before removing the bulb. The majority
of these types of bulbs can be removed from
their respective socket by turning them coun ...
Replacing the air filter element and cleaning the check hose
The air filter element should be replaced
at the intervals specified in the
periodic maintenance and lubrication
chart. Have a Yamaha dealer replace
the air filter element more frequently if
you are riding in unusually wet or dusty
areas. In addition, the air filter check
hose must be ...
Introduction
Welcome to the Yamaha world of motorcycling!
As the owner of the YZF-R125, you are benefiting from Yamaha's vast
experience and newest technology regarding the design
and manufacture of high-quality products, which have earned Yamaha a reputation
for dependability.
Please take the time to re ...