Honda NSA700A 2009 Owner's Manual page 144

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.
Checking & Adding Coolant
Refer to
Saf ety Precautions
RIGHT SIDE
(2)
(3)
(1) reserve tank
(2) UPPER level mark
(3) LOWER level mark
(4) reserve tank cap
Servicing Your Honda
Coolant
on page 92
(4)
(1)
137
.