Yamaha BIG BEAR 4X4 Owner's Manual page 117

Engine oil replacement and oil filter ele-
ment cleaning
1. Place the machine on a level surface.
2. Warm up the engine for several minutes
and stop it.
3. Place a container under the engine to
collect the used oil.
4. Remove the engine oil filler cap, and then
remove the drain bolt to drain the oil.
CAUTION:
_
When removing the drain bolt, the com-
pression spring, oil strainer and O-ring will
fall out. Take care not to lose these parts.
_
1. Drain bolt
3. Compression spring
5. Remove the oil filter cover by removing the
bolts and then remove the oil filter element.
1. Filter cover
8-6
2. O-ring
4. Oil strainer
2. Filter cover bolt (× 3)