1985-1987 Honda TRX 250 Fourtrax 250 Service Manual, Page 20Get this manual
LUBRICATION
FINAL DRIVE OIL
Remove the oil filler capLevel the rear wheels with the front whees by placing suppan block under the engine(The hont and resfaxles should be in the same plane)Check that the oil level reaches the lower edge of the oil filler cap hole If the level is lowpour fresh oil through the oil filler hole until it rea ches the lower edgeCheck for leaks