Yamaha YZF-R125 Service Manual: Adjusting the clutch cable free play
1. Check:
Clutch cable free play "a"
Out of specification 
Adjust.
2. Adjust:
- Clutch cable free play
a. Pull back the rubber cover "1" b. Loosen the locknut "2".
c. Turn the adjusting bolt "3" in direction "a" or
"b" until the specified clutch cable free play is
obtained.
d. Tighten the locknut.
e. Place the rubber cover in its original position.
NOTE:
If the specified clutch cable free play cannot be obtained on the handlebar end of the cable, use the adjusting nut on the engine end.
3. Remove:
- Left lower side cowling Refer to "GENERAL CHASSIS" on page 4-1.
a. Loosen the locknut "1".
b. Turn the adjusting nut "2" in direction "a" or "b"
until the specified clutch cable free play is obtained.
c. Tighten the locknut.
4. Install:
- Left lower side cowling Refer to "GENERAL CHASSIS" on page 4-1.
Changing the engine oil
1. Remove:
Right bottom cowling
Right upper side cowling
Right lower side cowling
Refer to "GENERAL CHASSIS" on page 4-1.
2. Start the engine, warm it up for several minutes,
and then tu ...
Cleaning the air filter element
NOTE:
There is a check hose "1" at the bottom of the air
filter case. If dust and/or water collects in this
hose, clean the air filter element and air filter
case.
1. Remove:
Rider seat
...
Other materials:
Starting failures
Engine
1. Cylinder and cylinder head
- Loose spark plug
- Loose cylinder head or cylinder
- Damaged cylinder head gasket
- Damaged cylinder gasket
- Worn or damaged cylinder
- Incorrect valve clearance
- Improperly sealed valve
- Incorrect valve-to-valve-seat contact
- Incorrect valve timi ...
Checking the front and rear brake pads
The front and rear brake pads must be
checked for wear at the intervals specified
in the periodic maintenance and
lubrication chart.
Front brake pads
Remove the front brake caliper by
removing the bolts.
Bolt
Brake caliper
Lining thickness
Check each front br ...
Lubricating the drive chain
The drive chain consists of many interacting
parts. If the drive chain is not maintained properly,
it will wear out quickly. Therefore, the drive
chain should be serviced, especially when the
vehicle is used in dusty areas.
This vehicle has a drive chain with small rubber
O-rings between eac ...