Honda SH125 2023 Owner's Manual page 103

Adding Coolant
If the coolant level is below the LOWER level
mark, add the recommended coolant
( P. 85) until the level reaches the UPPER
2
level mark.
Add fluid only from the reserve tank cap and
do not remove the radiator cap.
Remove the battery cover.
1.
Remove the reserve tank cap and add
2.
fluid while monitoring the coolant level.
Do not overfill above the UPPER level
u
mark.
Make sure no foreign objects enter the
u
reserve tank opening.
P. 92
2
Coolant
Reserve tank cap
Adding Coolant
u
Continued
97