2006-2009 Honda TRX680 (TRX 680 FA-FGA) Factory Service Manual, Page 174Get this manual
7COOLING SYSTEM
SYSTEM fLOW PATTERN7-2 SERVICE INfORMATION 7-3 TROUBLESHOOTING 7-4
THERMOSTATRADIATOR RESERVE TANK7-9 RADIATORCOOLING FAN7-10 WATER PUMP .713