2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 110Get this manual
CHANGING THE COOLANT
2.Remove: Plastic band Coolant reservoir bolts Coolant reservoir cap 3.Disconnect: Coolant reservoir breather hose 4
4.Drain: Coolant (from the coolant reservoir) 5.Connect: Coolant reservoir breather hose 6.Install: Coolant reservoir bolts Plastic band