Honda 2006 RC51 Owner's Manual page 108

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
LEFT SIDE
(1)
(2)
(1) UPPER level mark
(2) LOWER level mark
(3) reserve tank cap
www.ClassicCycles.org
Saf ety Precautions on page
Servicing Your Honda
Coolant
62 .
(3)
101