Page 14 of 100
EAU32220
Left view
XT660Z
DESCRIPTION
2-1
2
1. Idle adjusting screw (page 6-16)
2. Owner’s tool kit (page 6-1)
3. Air filter element (page 6-15)
4. Fuse box 1 (page 6-31)
5. Seat lock (page 3-16)
6. Shock absorber assembly spring preload adjusting ring (page 3-18)
7. Shift pedal (page 3-11)
8. Engine oil drain bolt (crankcase) (page 6-11)9. Engine oil drain bolt (oil tank) (page 6-11)
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Page 15 of 100
XT660ZA
DESCRIPTION
2-2
2
1. Main fuse (page 6-31)
2. Fuse box 1 (page 6-31)
3. Idle adjusting screw (page 6-16)
4. Fuse box 2 (page 6-31)
5. Fuse box 2 (page 6-31)
6. Seat lock (page 3-16)
7. Shock absorber assembly spring preload adjusting ring (page 3-18)
8. Shift pedal (page 3-11)9. Engine oil drain bolt (crankcase) (page 6-11)
10. Engine oil drain bolt (oil tank) (page 6-11)
11. Front wheel hub
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Page 16 of 100
EAU32230
Right view
XT660Z
DESCRIPTION
2-3
2
10. Grab bar
11. Main fuse (page 6-31)
12. Battery (page 6-29)
13. Rear brake fluid reservoir (page 6-21)
14. Coolant reservoir (page 6-14)
15. Front brake fluid reservoir (page 6-21)
16. Coolant drain bolt
17. Engine oil filter element (page 6-11)18. Brake pedal (page 3-12)
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Page 17 of 100
XT660ZA
DESCRIPTION
2-4
2
12. Rear brake fluid reservoir (page 6-21)
13. Fuse box 2 (page 6-31)
14. Owner’s tool kit (page 6-1)
15. Coolant reservoir (page 6-14)
16. Battery (page 6-29)
17. Front brake fluid reservoir (page 6-21)
18. Coolant drain bolt
19. Engine oil filter element (page 6-11)20. Brake pedal (page 3-12)
21. Rear wheel hub
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Page 58 of 100

3. Place an oil pan under the engine
to collect the used oil.
4. Remove the engine oil filler cap
and the drain bolt to drain the oil
from the crankcase.
1. Engine oil drain bolt (crankcase)
5. Remove the drain bolt to drain
the oil from the oil tank.
1. Engine oil drain bolt (oil tank)
6. Remove the oil filter element
drain bolt to drain the oil from the
oil filter element.
TIP
Skip steps 7–9 if the oil filter element
is not being replaced.
7. Remove the oil filter element
cover by removing the bolts.
1. Oil filter element drain bolt
2. Oil filter element cover bolt
8. Remove and replace the oil filter
element and O-rings.
TIP
Make sure that the O-rings are pro-
perly seated.
1. Oil filter element
2. O-ring
9. Install the oil filter element cover
by installing the bolts.
10. Install the oil filter element drain
bolt.
11. Tighten the oil filter element
cover bolts and the oil filter ele-
ment drain bolt to their specified
torques.
12. Install the engine oil drain bolts,
and then tighten them to their
specified torques.
Tightening torques:
Oil filter element cover bolt:
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Oil filter element drain bolt:
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
PERIODIC MAINTENANCE AND ADJUSTMENT
6-12
6
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Page 59 of 100

13. Add the specified amount of the
recommended engine oil, and
then install and tighten the oil
filler cap.
ECAM1061
The engine oil tank must be filled in
2 steps. First, fill the engine oil tank
with 1.90 L (2.0 US qt, 1.67 Imp.qt)
of the recommended engine oil.
Then, start the engine, race it 5 or 6
times, turn it off, and then add the
remainder of the engine oil.
TIP
Be sure to wipe off spilled oil on any
parts after the engine and exhaust
system have cooled down.
ECA11620
In order to prevent clutch slip-
page (since the engine oil also
lubricates the clutch), do not
mix any chemical additives. Do
not use oils with a diesel speci-
fication of “CD” or oils of a hig-
her quality than specified. In
addition, do not use oils labe-
led “ENERGY CONSERVING II”
or higher.
Make sure that no foreign
material enters the crankcase.
14. Start the engine, and then let it
idle for several minutes while
checking it for oil leakage. If oil is
leaking, immediately turn the
engine off and check for the cau-
se.
15. Turn the engine off, and then
check the oil level and correct it if
necessary.16. Install the engine guard by insta-
lling the screws.
NOTICE
Recommended engine oil:
See page 8-1
Without oil filter element
replacement:
2.50 L (2.64 US qt, 2.20 Imp.qt)
With oil filter element
replacement:
2.60 L (2.75 US qt, 2.29 Imp.qt
NOTICE
Tightening torques:
Engine oil drain bolt (crankcase):
30 Nm (3.0 m·kgf, 22 ft·lbf)
Engine oil drain bolt (oil tank):
18 Nm (1.8 m·kgf, 12.9 ft·lbf)
PERIODIC MAINTENANCE AND ADJUSTMENT
6-13
6
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