Honda CBR125R Owner's Manual page 92

LUBRICATION SYSTEM
Install the E-clip to the oil pump shaft.
Set the flat surface
of the E-clip is
upward.
INSTALLATION
Install the oil pump assembly.
Install and tighten the mounting bolts securely.
Install the right crankcase cover (page 10-8).
4-8
E-CLIP
OIL PUMP SHAFT
OIL PUMP ASSEMBLY
BOLTS