1986-1987 Honda TRX350 FourTrax 4X4, 1987-1989 TRX350D Foreman 4X4 Service Manual, Page 21Get this manual
LUBRICATION
ENGINE OIL LEVEL
Place the vehicle on level groundCheck the oil level using the oil filler capdipstick by inserting it into the filler hole without screwing it in If the oil level is below or near the lower level line on the dipstickadd the recommended oil (page 2-1) up to the upper level line(2) UPPER LEVEL
ENGINE OIL &FILTER CHANGE
NOTE Change engine oil with the engine warm and the vehicle on level ground to assure complete draining
Remove the oil filler cap and drain boltRemove the three bolts attaching the oil filter cover, oil filter and spring Discard the oil filter
Check that the sealing washer on the drain bolt is in good condition and install the drain boltTORQUE:
'86, '87: 15-25 Nm (1 .5-2.5 kg-m, 11-18 ft-Ib) After '87: 20-30 Nm (2.0-3.0 kg-m, 14-22 ft-Ib)