Yamaha TT-R125(P) Owner's Service Manual page 192

DRIVE CHAIN INSPECTION
EC369002
DRIVE CHAIN INSPECTION
1. Remove:
Master link clip
Joint 1
Drive chain 2
2. Clean:
Drive chain
Place it in kerosene, and brush off as
much dirt as possible. Then remove the
chain from the kerosene and dry the
chain.
3. Measure:
Drive chain length (10 links) a
Out of specification
4. Check:
Drive chain stiffness a
Clean and oil the chain and hold as
illustrated.
Stiff
5. Install:
Drive chain 1
Joint 2
Master link clip 3
CAUTION:
Be sure to install the master link clip to the
direction as shown.
a Turning direction
3 - 21
INSP
ADJ
Drive chain length (10 links):
<Limit>: 121.4 mm (4.78 in)
Replace drive chain.
New
Replace.