2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 140Get this manual

COOLING SYSTEM
SYSTEM TESTING
Remove the screw and radiator cap lid from the front fenderRemove the radiator capSCREW RADIATOR CAP LID

RADIATOR CAP

COOLANT (HYDROMETER TEST)

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives