Yamaha YZF-R125 Service Manual: Checking the swingarm
1. Check:
- Swingarm
Bends/cracks/damage
Replace.
2. Check:
- Pivot shaft
Roll the pivot shaft on a flat surface.
Bends
Replace.
| WARNING Do not attempt to straighten a bent pivot shaft. |
3. Wash:
- Pivot shaft
- Washer
- Swingarm adjusting collar
- Dust covers
- Spacers
- Bearings
4. Check:
- Washer
- Swingarm adjusting collar
- Dust covers
- Spacers
Oil seals
Damage/wear 
Replace.
- Bearings
Damage/pitting Replace.
Removing the swingarm
1. Stand the vehicle on a level surface.
WARNINGSecurely support the vehicle
so that there is
no danger of it falling over.
NOTE:
Place the vehicle on a suitable stand so that th ...
Installing the swingarm
1. Lubricate:
Bearings
Spacers
Dust covers
Pivot shaft
2. Install:
Bearings "1"
2. Swingarm
A. Left side
B. Right side
3. Install:
Swingarm adjusting collar "1"
Swin ...
Other materials:
Important manual information
Particularly important information is distinguished in this manual by the
following notations:
This is the safety alert symbol. It is used to alert you to potential personal
injury
hazards. Obey all safety messages that follow this symbol to avoid possible
injury
or death.
WARNING
...
Fuel tank cap
Fuel tank cap
Fuel tank cap lock cover
Unlock.
To remove the fuel tank cap
Open the fuel tank cap lock cover.
Insert the key into the lock and turn
it 1/4 turn counterclockwise. The
lock will be released and the fuel
tank cap can be removed.
To install the fuel tank ca ...
Checking the drive chain
1. Measure:
15-link section "a" of the drive chain
Out of specification Replace the drive
chain.
a. Measure the length "a" between the inner
sides of the pins and the length "b" between
the outer sides of the pins on a 15-link section
of the drive chain as shown in the illustration.
...