Page 49 of 90
PERIODIC MAINTENANCE AND MINOR REPAIR
6-6
6
EAU18760
Removing and installing the
cowling The cowling shown above needs to be
removed to perform some of the main-
tenance jobs described in this chapter.
Refer to this section each time the
cowling needs to be removed and in-
stalled.
EAU36831
Cowling
To remove the cowlingRemove the bolts, and then pull the
cowling off as shown.To install the cowling
Place the cowling in the original posi-
tion, and then install the bolts.
NOTE:Make sure that the grommet fits overthe projection.
1. Cowling
1. Cowling
2. Bolt
1. Cowling
2. Bolt
1. Cowling
2. Projection
3. Grommet
U5YUE3E0.book Page 6 Thursday, September 20, 2007 3:03 PM
Page 50 of 90
PERIODIC MAINTENANCE AND MINOR REPAIR
6-7
6
EAU19642
Checking the spark plugs The spark plugs are important engine
components, which should be checked
periodically, preferably by a Yamaha
dealer. Since heat and deposits will
cause any spark plug to slowly erode,
they should be removed and checked
in accordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plugs can re-
veal the condition of the engine.
The porcelain insulator around the cen-
ter electrode of each spark plug should
be a medium-to-light tan (the ideal color
when the vehicle is ridden normally),
and all spark plugs installed in the en-
gine should have the same color. If any
spark plug shows a distinctly different
color, the engine could be operating im-
properly. Do not attempt to diagnose
such problems yourself. Instead, have
a Yamaha dealer check the vehicle.
If a spark plug shows signs of electrode
erosion and excessive carbon or other
deposits, it should be replaced.Before installing a spark plug, the spark
plug gap should be measured with a
wire thickness gauge and, if necessary,
adjusted to specification.
Clean the surface of the spark plug
gasket and its mating surface, and then
wipe off any grime from the spark plug
threads.
NOTE:
If a torque wrench is not available when
installing a spark plug, a good estimate
of the correct torque is 1/4–1/2 turn
past finger tight. However, the spark
plug should be tightened to the speci-fied torque as soon as possible.
Specified spark plug:
NGK/DPR7EA-9
DENSO/X22EPR-U91. Spark plug gapSpark plug gap:
0.8–0.9 mm (0.031–0.035 in)
Tightening torque:
Spark plug:
17.5 Nm (1.75 m·kgf, 12.7 ft·lbf)
U5YUE3E0.book Page 7 Thursday, September 20, 2007 3:03 PM
Page 51 of 90
PERIODIC MAINTENANCE AND MINOR REPAIR
6-8
6
EAU36806
Engine oil and oil filter car-
tridge The engine oil level should be checked
before each ride. In addition, the oil
must be changed and the oil filter car-
tridge replaced at the intervals speci-
fied in the periodic maintenance and
lubrication chart.
To check the engine oil level
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion.NOTE:
Make sure that the vehicle is positioned
straight up when checking the oil level.
A slight tilt to the side can result in afalse reading.
2. Start the engine, warm it up until
the engine oil has reached a nor-
mal temperature of 60 °C (140 °F),
let it continue to idle for ten sec-
onds, and then turn the engine off.
NOTE:To achieve the proper engine oil tem-
perature for an accurate oil level read-
ing, the engine must have first
completely cooled down, and then
warmed up again for several minutes tonormal operating temperature.
3. Wait a few minutes until the oil set-
tles, remove the engine oil filler
cap, wipe the dipstick clean, insert
it back into the oil filler hole (with-
out screwing it in), and then re-
move it again to check the oil level.NOTE:The engine oil should be between theminimum and maximum level marks.4. If the engine oil is at or below the
minimum level mark, add sufficient
oil of the recommended type to
raise it to the correct level.
NOTE:When adding oil, be careful not to over-
fill the engine oil tank; the oil level rises
faster starting from the half level portionon the dipstick.
5. Insert the dipstick into the oil filler
hole, and then tighten the oil filler
cap.
1. Engine oil filler cap
1. Maximum level mark
2. Minimum level mark
3. Dipstick
U5YUE3E0.book Page 8 Thursday, September 20, 2007 3:03 PM
Page 52 of 90
PERIODIC MAINTENANCE AND MINOR REPAIR
6-9
6
CAUTION:
ECA10900
Make sure that the oil filler cap is se-
curely tightened, otherwise oil may
seep out when the engine is run-ning.
To change the engine oil (with or
without oil filter cartridge replace-
ment)
1. Place the vehicle on a level sur-
face.
2. Remove the cowling. (See page
6-6.)
3. Start the engine, warm it up for
several minutes, and then turn it
off.
4. Place an oil pan under the oil tank
to collect the used oil.
5. Remove the engine oil filler cap
and drain bolt to drain the oil from
the oil tank.6. Place an oil pan under the engine
to collect the used oil.
7. Remove the engine oil drain bolt to
drain the oil from the crankcase.
NOTE:Skip steps 8–12 if the oil filter cartridgeis not being replaced.
8. Remove the rectifier/regulator by
removing the bolts.
9. Remove the oil filter cartridge with
an oil filter wrench.
1. Engine oil drain bolt (oil tank)
1. Engine oil drain bolt (crankcase)
1. Rectifier/regulator
2. Bolt
U5YUE3E0.book Page 9 Thursday, September 20, 2007 3:03 PM
Page 53 of 90
PERIODIC MAINTENANCE AND MINOR REPAIR
6-10
6
NOTE:An oil filter wrench is available at aYamaha dealer.
10. Apply a thin coat of engine oil to
the O-ring of the new oil filter car-
tridge.
NOTE:
Make sure that the O-ring is properlyseated.
11. Install the new oil filter cartridge
with an oil filter wrench, and then
tighten it to the specified torque
with a torque wrench.12. Install the rectifier/regulator by in-
stalling the bolts, and then tighten
them to the specified torque.
13. Install the engine oil drain bolts,
and then tighten them to the spec-
ified torques.
1. Oil filter cartridge
2. Oil filter wrench
1. O-ring
1. Torque wrench
Tightening torque:
Oil filter cartridge:
17 Nm (1.7 m·kgf, 12 ft·lbf)
Tightening torque:
Rectifier/regulator bolt:
6.5 Nm (0.65 m·kgf, 4.7 ft·lbf)
U5YUE3E0.book Page 10 Thursday, September 20, 2007 3:03 PM
Page 54 of 90
PERIODIC MAINTENANCE AND MINOR REPAIR
6-11
614. Pour only 2.5 L (2.6 US qt) (2.2
Imp.qt) of the specified amount of
recommended engine oil through
the filler hole, insert the dipstick,
and then tighten the oil filler cap.
15. Start the engine, rev it several
times, and then turn it off.
16. Remove the engine oil filler cap,
and then gradually fill the oil tank
with the remaining oil quantity
while regularly checking the oil lev-
el on the dipstick.
NOTE:Be sure to wipe off spilled oil on any
parts after the engine and exhaust sys-tem have cooled down.CAUTION:
ECA15080
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 high-
er quality than specified. In
addition, do not use oils labeled
“ENERGY CONSERVING II” or
higher.
Make sure that no foreign mate-rial enters the oil tank.17. Install the engine oil filler cap.
18. Start the engine, and then let it idle
for several minutes while checking
it for oil leakage. If oil is leaking, im-
mediately turn the engine off and
check for the cause.
19. Turn the engine off, and then
check the oil level and correct it if
necessary.
20. Install the cowling.
Tightening torques:
Engine oil drain bolt (crankcase):
43 Nm (4.3 m·kgf, 31 ft·lbf)
Engine oil drain bolt (oil tank):
35 Nm (3.5 m·kgf, 25 ft·lbf)
Recommended engine oil:
See page 8-1.
Oil quantity:
Without oil filter cartridge replace-
ment:
3.70 L (3.91 US qt) (3.26 Imp.qt)
With oil filter cartridge replacement:
4.10 L (4.33 US qt) (3.61 Imp.qt)
1.“CD” specification
2.“ENERGY CONSERVING II”
1
2
U5YUE3E0.book Page 11 Thursday, September 20, 2007 3:03 PM
Page 55 of 90
PERIODIC MAINTENANCE AND MINOR REPAIR
6-12
6
EAU36762
Air filter element The air filter element must be replaced
at the intervals specified in the periodic
maintenance and lubrication chart.
Have a Yamaha dealer replace the air
filter element.
EAU21382
Checking the throttle cable
free play The throttle cable free play should mea-
sure 3.0–5.0 mm (0.12–0.20 in) at the
throttle grip. Periodically check the
throttle cable free play and, if neces-
sary, have a Yamaha dealer adjust it.
EAU21401
Valve clearance The valve clearance changes with use,
resulting in improper air-fuel mixture
and/or engine noise. To prevent this
from occurring, the valve clearance
must be adjusted by a Yamaha dealer
at the intervals specified in the periodic
maintenance and lubrication chart.
1. Throttle cable free play
U5YUE3E0.book Page 12 Thursday, September 20, 2007 3:03 PM
Page 56 of 90
PERIODIC MAINTENANCE AND MINOR REPAIR
6-13
6
EAU21771
Tires To maximize the performance, durabil-
ity, and safe operation of your motor-
cycle, note the following points
regarding the specified tires.
Tire air pressure
The tire air pressure should be checked
and, if necessary, adjusted before each
ride.
WARNING
EWA10500
The tire air pressure must be
checked and adjusted on cold
tires (i.e., when the temperature
of the tires equals the ambient
temperature).
The tire air pressure must be ad-
justed in accordance with the
riding speed and with the total
weight of rider, passenger, car-
go, and accessories approvedfor this model.
WARNING
EWA11020
Because loading has an enormous
impact on the handling, braking,
performance and safety characteris-
tics of your motorcycle, you should
keep the following precautions in
mind.
NEVER OVERLOAD THE
MOTORCYCLE! Operation of an
overloaded motorcycle may re-
sult in tire damage, loss of con-
trol, or severe injury. Make sure
that the total weight of rider,
passenger, cargo, and accesso-
ries does not exceed the speci-
fied maximum load for the
vehicle.
Do not carry along loosely
packed items, which can shift
during a ride.
Securely pack the heaviest
items close to the center of the
motorcycle and distribute the
weight evenly on both sides.
Adjust the suspension and tire
air pressure with regard to the
load.
Check the tire condition and airpressure before each ride.
Tire air pressure (measured on cold
tires):
0–90 kg (0–198 lb):
Front:
250 kPa (36 psi) (2.50 kgf/cm²)
Rear:
290 kPa (42 psi) (2.90 kgf/cm²)
90–199 kg (198–439 lb):
Front:
250 kPa (36 psi) (2.50 kgf/cm²)
Rear:
290 kPa (42 psi) (2.90 kgf/cm²)
High-speed riding:
Front:
250 kPa (36 psi) (2.50 kgf/cm²)
Rear:
290 kPa (42 psi) (2.90 kgf/cm²)
Maximum load*:
199 kg (439 lb)
* Total weight of rider, passenger, car-
go and accessories
U5YUE3E0.book Page 13 Thursday, September 20, 2007 3:03 PM
