2004 Official factory service manual for Yamaha YFZ450S ATV Quad., Page 98Get this manual
CHANGING THE COOLANT
12.Fill: cooling system (with the specified amount of the recommended coolant) Recommended antifreeze High-quality ethylene glycol antifreeze containing corrosion inhibitors for aluminum engines Mixing ratio 1:1 (antifreeze:water) Quantity Total amount 1.3 (1.14 Imp qt, 1.37 US qt) Coolant reservoir capacity 0.29 (0.26 Imp qt, 0.31 US qt) Handling notes for coolant Coolant is potentially harmful and should be handled with special careWARNING