2006-2009 Yamaha YFM700RV Raptor 700RV factory service manual, Page 114Get this manual
CHANGING THE COOLANT 5Remove: radiator cap 1
WARNING hot radiator is under pressureTherefore, do not remove the radiator cap when the engine is hotScalding hot fluid and steam may be blown out, which could cause serious injuryWhen the engine has cooled, open the radiator cap as follows: Place thick rag or towel over the radiator cap and slowly turn the radiator cap counterclockwise toward the detent to allow any residual pressure to escapeWhen the hissing sound has stopped, press down on the radiator cap and turn it counterclockwise to remove