Honda 2003 NPS50 Ruckus Service Manual page 112

Remove the wire band from the water pump stay.
Disconnect the water hoses.
Remove the bolts and water pump.
Remove the D-ring from the water pump.
THERMOSTAT
Remove the bolts, stay and thermostat cover.
Remove the rubber seal from the thermostat cover.
Remove the thermostat.
COOLING SYSTEM
STAY
COVER
RUBBER SEAL
7-9