Honda CBR 125RW 2007 Owner's Manual page 92

Coolant
Decreasing the concentration of antifreeze
to less than 40% will not provide proper
corrosion protection.
Increasing the concentration of antifreeze
is not recommended because it decreases
cooling system performance. Higher
concentrations of antifreeze (up to 60%)
should only be used to provide additional
protection against freezing. Check the
cooling system frequently during freezing
weather.
82 Servicing Your Honda
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Refer to Safety Precautions on page 52 .
LEFT SIDE
(1) reserve tank
(2) UPPER level mark
(3) LOWER level mark