torque YAMAHA MT-01 2008 Owners Manual

INSTRUMENT AND CONTROL FUNCTIONS
3-18
3spring preload; the shorter dis-
tance A is, the higher the spring
preload.
3. Tighten the locknut to the specified
torque.
CAUTION:
ECA10120
Always tighten the locknut against
the adjusting nut, and then tightenthe locknut to the specified torque.
Rebound damping force
To increase the rebound damping force
and thereby harden the rebound damp-
ing, turn the adjusting knob in direction
(a). To decrease the rebound damping
force and thereby soften the rebound
damping, turn the adjusting knob in di-
rection (b).Compression damping force
To increase the compression damping
force and thereby harden the compres-
sion damping, turn the adjusting screw
in direction (a). To decrease the com-
pression damping force and thereby
soften the compression damping, turn
the adjusting screw in direction (b).
1. Distance ASpring preload:
Minimum (soft):
Distance A = 155.0 mm (6.10 in)
Standard:
Distance A = 150.0 mm (5.91 in)
Maximum (hard):
Distance A = 145.0 mm (5.71 in)
Tightening torque:
Locknut:
42 Nm (4.2 m·kgf, 30 ft·lbf)
1. Rebound damping force adjusting knob
Rebound damping setting:
Minimum (soft):
20 click(s) in direction (b)*
Standard:
12 click(s) in direction (b)*
Maximum (hard):
3 click(s) in direction (b)*
* With the adjusting knob fully turned
in direction (a)1. Compression damping force adjusting screw
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-1
6
EAU17240
Safety is an obligation of the owner. Pe-
riodic inspection, adjustment and lubri-
cation will keep your vehicle in the
safest and most efficient condition pos-
sible. The most important points of in-
spection, adjustment, and lubrication
are explained on the following pages.
The intervals given in the periodic
maintenance and lubrication chart
should be simply considered as a gen-
eral guide under normal riding condi-
tions. However, DEPENDING ON THE
WEATHER, TERRAIN, GEOGRAPHI-
CAL LOCATION, AND INDIVIDUAL
USE, THE MAINTENANCE INTER-
VALS MAY NEED TO BE SHORT-
ENED.
WARNING
EWA10320
If you are not familiar with mainte-
nance work, have a Yamaha dealerdo it for you.
EAU36710
Owner’s tool kit The owner’s tool kit is located on the
bottom of the seat. (See page 3-15.)
The service information included in this
manual and the tools provided in the
owner’s tool kit are intended to assist
you in the performance of preventive
maintenance and minor repairs. How-
ever, additional tools such as a torque
wrench may be necessary to perform
certain maintenance work correctly.NOTE:If you do not have the tools or experi-
ence required for a particular job, havea Yamaha dealer perform it for you.
WARNING
EWA10350
Modifications not approved by
Yamaha may cause loss of perfor-
mance and render the vehicle un-
safe for use. Consult a Yamaha
dealer before attempting any chang-es.
1. Owner’s tool kit
U5YUE3E0.book Page 1 Thursday, September 20, 2007 3:03 PM

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)
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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)
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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
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-19
64. If the drive chain slack is incorrect,
adjust it as follows.
EAU34312
To adjust the drive chain slack
1. Loosen the axle nut and the lock-
nut on each side of the swingarm.2. To tighten the drive chain, turn the
drive chain slack adjusting bolt on
each side of the swingarm in direc-
tion (a). To loosen the drive chain,
turn the adjusting bolt on each side
of the swingarm in direction (b),
and then push the rear wheel for-
ward.
NOTE:Using the alignment marks on each
side of the swingarm, make sure that
both chain pullers are in the same posi-tion for proper wheel alignment.
CAUTION:
ECA10570
Improper drive chain slack will over-
load the engine as well as other vital
parts of the motorcycle and can lead
to chain slippage or breakage. To
prevent this from occurring, keep
the drive chain slack within thespecified limits.
3. Tighten the locknuts, then the axle
nut to their specified torques.
1. Drive chain slack
1. Axle nut
2. Drive chain slack adjusting bolt
3. Locknut
4. Alignment marks
Tightening torques:
Locknut:
16 Nm (1.6 m·kgf, 11 ft·lbf)
Axle nut:
150 Nm (15.0 m·kgf, 110 ft·lbf)
U5YUE3E0.book Page 19 Thursday, September 20, 2007 3:03 PM