2018 YAMAHA YZF-R3 torque

Instrument and control functions
3-22
3
EAU68141
A djustin g the shock a bsorb er
assem bly
This shock absorber assembly is
equipped with a spring preload adjust-
ing ring.
NOTICE
ECA10102
To avoi d d amag ing the mechanism,
d o not attempt to turn b eyond the
maximum or minimum settin gs.
Adjust the spring preload as follows.
1. Remove the drive chain guard by removing the bolts and collars.
2. To increase the spring preload and thereby harden the suspen-
sion, turn the adjusting ring in di-
rection (a). To decrease the spring
preload and thereby soften the
suspension, turn the adjusting ring
in direction (b). Align the appropriate notch in
the adjusting ring with the po-
sition indicator on the shock
absorber.
 Use the special wrench and
the extension bar included in
the owner’s tool kit to make
the adjustment. 3. Install the drive chain guard by in-
stalling the collars and bolts, and
then tighten the bolts to the spec-
ified torque.
1. Drive chain guard
2. Bolt and collar
2
1
1. Extension bar
2. Special wrench
3. Spring preload adjusting ring
4. Position indicator
Sprin g preloa d settin g:
Minimum (soft): 1
Standard: 3
Maximum (hard):
7
Ti ghtening torque:
Drive chain guard bolt: 10 N·m (1.0 kgf·m, 7.4 lb·ft)
7654321
4
(b)
(a)
32
1
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Periodic maintenance an d a djustment
6-2
6
EAU17303
Emission controls not only function to
ensure cleaner air, but are also vital to
proper engine operation and maximum
performance. In the following periodic
maintenance charts, the services relat-
ed to emissions control are grouped
separately. These services require
specialized data, knowledge, and
equipment. Maintenance, replace-
ment, or repair of the emission control
devices and systems may be per-
formed by any repair establishment or
individual that is certified (if applicable).
Yamaha dealers are trained and equipped to perform these particular
services.
EAUB1402
Owner’s tool kit
The owner’s tool kit is located on the
bottom of the passenger seat (see
page 3-18) and is held in place with an
O-ring.
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.
TIP
If you do not have the tools or experi-
ence required for a particular job, have
a Yamaha dealer perform it for you.
1. Owner’s tool kit
2. O-ring
1
2
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Periodic maintenance an d a djustment
6-7
6
EAU19643
Checkin g the spark plu gs
The spark plugs are important engine
components, which should be
checked periodically, preferably by a
Yamaha dealer. Since heat and depos- its will cause any spark plug to slowly
erode, they should be removed and
checked in accordance with the peri-
odic maintenance and lubrication
chart. In addition, the condition of the
spark plugs can reveal the condition of
the engine.
The porcelain insulator around the
center 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 engine should have the same
color. If any spark plug shows a dis-
tinctly different color, the engine could
be operating improperly. Do not at-
tempt to diagnose such problems
yourself. Instead, have a Yamaha deal-
er check the vehicle.
If a spark plug shows signs of elec-
trode 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.
TIP
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
specified torque as soon as possible.
Specifie
d spark plu g:
NGK/LMAR8A-9
1. Spark plug gap
Spark plu g g ap:
0.8–0.9 mm (0.031–0.035 in)
Ti ghtening torque:
Spark plug: 13.0 N·m (1.3 kgf·m, 9.6 lb·ft)
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Periodic maintenance an d a djustment
6-9
6 4. If the engine oil is below the mini-
mum level mark, add sufficient oil
of the recommended type to raise
it to the correct level.
To chan ge the en gine oil (with or
without oil filter cartri dge replace-
ment) 1. Place the vehicle on a level surfa- ce.
2. Start the engine, warm it up for several minutes, and then turn it
off.
3. Place an oil pan under the engine to collect the used oil.
4. Remove the engine oil filler cap, the engine oil drain bolt and its
gasket to drain the oil from the
crankcase.
TIP
Skip steps 5–7 if the oil filter cartridge
is not being replaced.
5. Remove the oil filter cartridge withan oil filter wrench.
TIP
An oil filter wrench is available at a
Yamaha dealer.
6. Apply a thin coat of clean engine oil to the O-ring of the new oil filter
cartridge.
TIP
Make sure that the O-ring is properly
seated.
7. Install the new oil filter cartridgewith an oil filter wrench, and then
tighten it to the specified torque
with a torque wrench.
1. Engine oil drain bolt
2. Gasket
21
1. Oil filter wrench
2. Oil filter cartridge
1. O-ring
1 2
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Periodic maintenance an d a djustment
6-10
6
8. Install the engine oil drain bolt and
its new gasket, and then tighten
the bolt to the specified torque.TIP
Install the new gasket as shown.
9. Refill with the specified amount ofthe recommended engine oil, and
then install and tighten the oil filler
cap.
TIP
Be sure to wipe off spilled oil on any
parts after the engine and exhaust sys-
tem have cooled down.
NOTICE
ECA11621
In or der to prevent clutch slip-
pa ge (since the en gine oil also
lu bricates the clutch), do not
mix any chemical additives. Do
not use oils with a diesel speci-
fication of “CD” or oils of a hi gh-
er quality than specified . In
a dd ition, do not use oils la bele d
“ENERGY CONSERVING II” or
hi gher.
 Make sure that no forei gn mate-
rial enters the crankcase.
10. 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 cause.
TIP
After the engine is started, the engine
oil pressure warning light should go off.
1. Torque wrench
Tightening torque:
Oil filter cartridge: 17 N·m (1.7 kgf·m, 13 lb·ft)
1. Engine oil drain bolt
2. Gasket
Tightening torque:
Engine oil drain bolt: 20 N·m (2.0 kgf·m, 15 lb·ft)
1
2
1
Recommen ded en gine oil:
See page 8-1.
Oil quantity: Oil change:
1.80 L (1.90 US qt, 1.58 Imp.qt)
With oil filter removal: 2.10 L (2.22 US qt, 1.85 Imp.qt)
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Periodic maintenance an d a djustment
6-24
6
prevent this from occurrin
g,
keep the d rive chain slack with-
in the specifie d limits.
[ECA17791]
EAU62983
To adjust the d rive chain slack
Consult a Yamaha dealer before ad-
justing the drive chain slack. 1. Remove the drive chain puller cap, and then loosen the axle nut and
the locknut on each side of the
swingarm.
2. To tighten the drive chain, turn the drive chain slack adjusting nut on
each side of the swingarm in di-
rection (a). To loosen the drive
chain, turn the adjusting nut on
each side of the swingarm in di-
rection (b), and then push the rear
wheel forward.
TIP
Using the alignment marks on each
side of the swingarm, make sure that
both drive chain pullers are in the same
position for proper wheel alignment.
3. Tighten the axle nut, then the lock-nuts to their specified torques.
4. Make sure that the drive chain pullers are in the same position,
the drive chain slack is correct,
and the drive chain moves
smoothly.
5. Install the drive chain puller caps.
1. Axle nut
2. Locknut
3. Drive chain puller cap
1
2
1. Drive chain slack adjusting nut
1. Alignment marks
2. Drive chain puller
Ti ghtenin g torques:
Axle nut:
57 N·m (5.7 kgf·m, 42 lb·ft)
Locknut: 16 N·m (1.6 kgf·m, 12 lb·ft)
1(a)
(b)
1
2
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