Yamaha YZF-R125 Owners Manual: Checking the front fork
The condition and operation of the front fork must be checked as follows at the intervals specified in the periodic maintenance and lubrication chart.
To check the condition
Check the inner tubes for scratches, damage and excessive oil leakage.
To check the operation
- Place the vehicle on a level surface and hold it in an upright position. WARNING! To avoid injury, securely support the vehicle so there is no danger of it falling over.
- While applying the front brake, push down hard on the handlebars several times to check if the front fork compresses and rebounds smoothly.
Checking the front fork
NOTICE
If any damage is found or the front
fork does not operate smoothly,
have a Yamaha dealer check or repair
it.
Lubricating the swingarm pivots
The swingarm pivots must be lubricated
at the intervals specified in the periodic
maintenance and lubrication chart.
Recommended lubricant:Molybdenum disulfide grease
...
Checking the steering
Worn or loose steering bearings may
cause danger. Therefore, the operation
of the steering must be checked as follows
at the intervals specified in the periodic
maintenance and lubrication
c ...
Other materials:
Checking the speed sensor
1. Check:
Speed sensor output voltage
Out of specification → Replace.
a. Connect the pocket tester (DC 20 V) to the
speed sensor coupler (wire harness end) as
shown.
Positive tester probe
gray "1"
Negative tester probe
gray/black "2"
b. Set the main switch to "ON".
c. ...
Adjusting the clutch lever free play
Adjusting the clutch lever free play
Clutch lever free play adjusting bolt
Clutch lever free play
The clutch lever free play should measure
10.0-15.0 mm (0.39-0.59 in) as
shown. Periodically check the clutch lever
free play and, if necessary, adjust it
as follows.
Slide the ...
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 coupler as
shown.
Positive tester probe
brown/white "1"
Negative tester probe
gray/black ...