2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 82Get this manual
MAINTENANCE OIL CHANGE Pour the engine oil after replacing the oil filter (page 3-15) Change the oil with the engine warm to assure complete and rapid drainingStart the engine and let it idle for few minutesStop the engine and remove the oil filler capRemove the oil drain bolt and drain the engine oilAfter draining the oil completely, install the drain bolt with new sealing washer and tighten itTORQUE: 25 Nm (2.5 kgfm, 18 lbfft)