Instrument and control functions
4-45
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2
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7
8
9
10
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3. Tighten the locknut to the specified
torque. NOTICE: Always tighten
the locknut against the adjust-
ing ring, and then tighten the
locknut to the specified
torque.
[ECA22760]
Rebound damping force
To increase the rebound damping force
and thereby harden the rebound damp-
ing, turn the adjusting screw in direction
(a). To decrease the rebound damping
force and thereby soften the rebound
damping, turn the adjusting screw in di-
rection (b). Compression damping force
Fast compression damping force
To increase the compression damping
force and thereby harden the fast com-
pression damping, turn the adjusting
bolt in direction (a). To decrease the
compression damping force and there-by soften the compression damping,
turn the adjusting bolt in direction (b).
Slow compression damping force
To increase the compression damping
force and thereby harden the slow
compression damping, turn the adjust-
ing screw in direction (a). To decrease
Spring preload:
Minimum (soft): Distance A = 77.5 mm (3.05 in)
Standard:
Distance A = 79.0 mm (3.11 in)
Maximum (hard): Distance A = 85.5 mm (3.37 in)
Tightening torque: Locknut: 25 N·m (2.5 kgf·m, 18 lb·ft)
1. Rebound damping force adjusting screwRebound damping setting:Minimum (soft):
23 click(s) in direction (b)*
Standard: 12 click(s) in direction (b)*
Maximum (hard): 1 click(s) in direction (b)*
* With the adjusting screw fully turned
in direction (a)(a) (b)
1
1. Fast compression damping force
adjusting boltFast compression damping settingMinimum (soft):
5.5 turn(s) in direction (b)*
Standard: 3 turn(s) in direction (b)*
Maximum (hard): 0 turn(s) in direction (b)*
* With the adjusting bolt fully turned in
direction (a)
(a) (b)
1
BX4-9-E1_1.book 45 ページ 2018年4月27日 金曜日 午後4時3分
Instrument and control functions
4-47
1
2
345
6
7
8
9
10
11
12
3. Tighten the locknut to the specified
torque. NOTICE: Always tighten
the locknut against the adjust-
ing ring, and then tighten the
locknut to the specified
torque.
[ECA22760] EAU67050
EXUP systemThis model is equipped with Yamaha’s
EXUP (EXhaust Ultimate Power valve)
system. This system boosts engine
power by means of a valve that controls
exhaust flow within the exhaust cham-
ber.NOTICE
ECA15611
The EXUP system has been set and
extensively tested at the Yamaha
factory. Changing these settings
without sufficient technical knowl-
edge may result in poor perfor-mance of or damage to the engine.
1. Spring preload adjusting ring
2. Locknut
1. Distance A
1
(a) (b)
2
1
Spring preload:
Minimum (soft):Distance A = 0 mm (0.00 in)
Standard:
Distance A = 4 mm (0.16 in)
Maximum (hard): Distance A = 9 mm (0.35 in)
Tightening torque: Locknut:25 N·m (2.5 kgf·m, 18 lb·ft)
BX4-9-E1_1.book 47 ページ 2018年4月27日 金曜日 午後4時3分
Periodic maintenance and adjustment
7-2
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EAU67091
Tool kitThe tool kit should be stored separately
from the vehicle. However, there are
two hexagon wrenches stored under
the passenger seat. (See page 4-38.)
The information included in this manual
and the tools provided are intended to
assist you in the performance of pre-
ventive maintenance and minor re-
pairs. However, a torque wrench and
other tools are necessary to perform
certain maintenance work correctly.TIPIf you do not have the tools or experi-
ence required for a particular job, haveyour Yamaha dealer perform it for you.1. Hexagon wrench
1
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Periodic maintenance and adjustment
7-11
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EAU67110
Checking the spark plugsThe 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.
NOTICE
ECA10841
Do not use any tools to remove or in-
stall the spark plug cap, otherwise
the ignition coil coupler may get
damaged. The spark plug cap may
be difficult to remove because the
rubber seal on the end of the cap fits
tightly. To remove the spark plug
cap, simply twist it back and forth
while pulling it out; to install it, twistit back and forth while pushing it in.
Specified spark plug:
NGK/LMAR9E-J
1. Spark plug gapSpark plug gap: 0.6–0.7 mm (0.024–0.028 in)
Tightening torque: Spark plug (new):18 N·m (1.8 kgf·m, 13 lb·ft)
Spark plug (after checking):
13 N·m (1.3 kgf·m, 9.6 lb·ft)
1
1
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Periodic maintenance and adjustment7-14
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TIPMake sure that the O-ring is properlyseated. 7. Install the new oil filter cartridge with an oil filter wrench, and then
tighten it to the specified torque
with a torque wrench. 8. Install the engine oil drain bolt and
its new gasket, and then tighten
the bolt to the specified torque.
9. Refill with the specified amount of the recommended engine oil.
TIPBe sure to wipe off spilled oil on any
parts after the engine and exhaust sys-tem have cooled down.NOTICE
ECA11621
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 crankcase.
1. O-ring
1
1. Torque wrenchTightening torque:Oil filter cartridge:
17 N·m (1.7 kgf·m, 13 lb·ft)
Tightening torque: Engine oil drain bolt:23 N·m (2.3 kgf·m, 17 lb·ft)
1
Recommended engine oil:
Full synthetic
10W-40, 15W-50
Oil quantity:
Oil change:3.90 L (4.12 US qt, 3.43 Imp.qt)
With oil filter removal:
4.10 L (4.33 US qt, 3.61 Imp.qt)
BX4-9-E1_1.book 14 ページ 2018年4月27日 金曜日 午後4時3分
Periodic maintenance and adjustment7-26
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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.
TIPUsing the alignment marks on each
side of the swingarm, make sure that
both drive chain pullers are in the sameposition for proper wheel alignment. 3. Tighten the axle nut, then the lock-
nuts to their specified torques.
4. Make sure that the drive chain pull- ers are in the same position, the
drive chain slack is correct, and
the drive chain moves smoothly.
EAU23026
Cleaning and l ubricating the
drive chainThe drive chain must be cleaned and
lubricated at the intervals specified in
the periodic maintenance and lubrica-
tion chart, otherwise it will quickly wear
out, especially when riding in dusty or
wet areas. Service the drive chain as
follows.NOTICE
ECA10584
The drive chain must be lubricated
after washing the motorcycle, ridingin the rain or riding in wet areas.
1. Clean the drive chain with kero- sene and a small soft brush.
NOTICE: To prevent damaging
the O-rings, do not clean the
drive chain with steam cleaners,
high-pressure washers or inap-
propriate solvents.
[ECA11122]
2. Wipe the drive chain dry.
3. Thoroughly lubricate the drive chain with a special O-ring chain
lubricant. NOTICE: Do not use
engine oil or any other lubri-
cants for the drive chain, as they
1. Axle nut
2. Drive chain puller
3. Drive chain slack adjusting bolt
4. Locknut
5. Alignment marksTightening torques: Axle nut:190 N·m (19 kgf·m, 140 lb·ft)
Locknut: 16 N·m (1.6 kgf·m, 12 lb·ft)
1
2 3
45
(a)
(b)
BX4-9-E1_1.book 26 ページ 2018年4月27日 金曜日 午後4時3分