Honda CRF125F 2023 Owner's Manual page 117

Drive Chain
Removal, Cleaning & Replacement
LEFT SIDE
(1) master link retaining clip
108
Servicing Your Honda
When the drive chain becomes extremely dirty,
it should be removed and cleaned prior to
lubrication.
1. Remove the master link retaining clip (1)
with pliers. Do not bend or twist the clip.
(1)
Remove the master link. Remove the drive
chain.
2. Clean the drive chain with a non-flammable
(high flash point) solvent such as kerosene–
not gasoline–and allow it to dry.
3. Inspect the drive chain for possible wear or
damage. Replace the drive chain if it has
damaged rollers, loose fitting links, or
otherwise appears unserviceable.
Replacement chain:
DID 428HD