Yamaha YZF-R125 Service Manual: Checking the camshaft
1. Check:
- Camshaft lobes
Blue discoloration/pitting/scratches
Replace the camshaft.
2. Measure:
- Camshaft lobe dimensions "a" and "b"
Out of specification
Replace
the camshaft.
3. Check:
Camshaft oil passage
Obstruction Blow out with
compressed air.
Camshaft
...
Checking the rocker arms and rocker arm shafts
The following procedure applies to all of the
rocker arms and rocker arm shafts.
1. Check:
Rocker arm
Damage/wear Replace.
2. Check:
Rocker arm shaft
Blue discoloration/excessive wea ...
Other materials:
Cast wheels
To maximize the performance, durability,
and safe operation of your vehicle,
note the following points regarding the
specified wheels.
The wheel rims should be checked
for cracks, bends or warpage before
each ride. If any damage is
found, have a Yamaha dealer replace
the wheel. ...
Checking the rectifier/regulator
1. Check:
Rectifier/regulator output voltage
Out of specification → Replace the
rectifier/
regulator.
a. Set the engine tachometer to the spark plug
lead.
b. Connect the pocket tester (DC 20 V) to the
rectifier/regulator coupler as shown.
Positive tester probe
red "1"
Negat ...
Installing the radiator
1. Fill:
Cooling system
(with the specified amount of the recommended
coolant)
Refer to "CHANGING THE COOLANT" on
page 3-15.
2. Check:
Cooling system
Leaks Repair or replace any
faulty part.
3. Measure:
Radiator cap opening pressure
Below the specified pressure Repla ...