Yamaha YZF-R125 Service Manual: Checking the fid (fast idle solenoid)
1. Disconnect:
- FID (fast idle solenoid) coupler
2. Check:
- FID (fast idle solenoid) resistance
a. Disconnect the FID (fast idle solenoid) coupler from the FID.
b. Connect the pocket tester ( 
× 10)
to the terminals
of the FID (fast idle solenoid).
- Positive tester probe
red/black terminal "1" - Negative tester probe
yellow/red terminal "2"
c. Measure the FID (fast idle solenoid) resistance.
Out of specification Replace
the throttle
body assembly.
Intake air temperature sensor
1. Check:
Intake air temperature sensor resistance
Out of specification Replace
the throttle
body.
a. Connect the pocket tester ( ×
1k) to the
throttle body sensor assembly co ...
Troubleshooting
...
Other materials:
Checking the front brake caliper
1. Check:
Brake caliper pistons "1"
Rust/scratches/wear Replace the
brake
caliper assembly.
Brake caliper body "2"
Cracks/damage Replace the brake
caliper
assembly.
Brake fluid delivery passages
(brake caliper body)
Obstruction Blow out with
compressed air.
...
Checking the coolant temperature sensor
1. Remove:
Coolant temperature sensor
WARNING
Handle the coolant temperature sensor
with special care.
Never subject the coolant temperature sensor
to strong shocks. If the coolant temperature
sensor is dropped, replace it.
2. Check:
Coolant temper ...
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 ...