2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 188Get this manual
ENGINE REMOVALINSTALLATION Disconnect the spark plug cap and engine coolant temperature (ECT) sensor connectorECT SENSOR CONNECTOR
'04'05: Remove the hose clamp from the breather hosesDisconnect the crankcase breather hose from the 3way jointLoosen the hose band screw and disconnect the lower radiator hose from the water pump cover