service YAMAHA YZ65 2018 Owners Manual

Introduction
Motorcycles are sin gle track vehicles. Their safe use an d operation are d e-
pen dent upon the use of proper ri din g techniques as well as the expertise of
the operator. Every operator shoul d know the followin g requirements before
ri din g this motorcycle.
He or she should:  Obtain thorough instructions from a competent source on all aspects of mo-
torcycle operation.
 Observe the warnings and maintenance requirements in this Owner’s Manu-
al.
 Obtain qualified training in safe and proper riding techniques.
 Obtain professional technical service as indicated in this Owner’s Manual
and/or when made necessary by mechanical conditions.
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Instrument and control functions
4-15
4

Do not deform or damag e the
cylin der in any way. Cylin der
d amag e will result in poor
d ampin g performance.
 Do not d ispose of a damag ed or
worn-out shock a bsor ber as-
sem bly yourself. Take the shock
a b sor ber assem bly to a Yamaha
d ealer for any service.
EAU41382
Remova ble si destan d
This motorcycle is equipped with a re-
movable sidestand.
TIP
Make sure that the sidestand is proper-
ly secured when the motorcycle is be-
ing supported or is being transported.
WARNING
EWA14602
Never apply force on the motor-
cycle while it is on the si de-
stan d.
 Always remove the si destan d
b efore startin g out.
1. Sidestand
1
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Operation and important ri din g points
6-3
6
an
d d rive train, which are not
d esi gne d to withstan d the
shock of force d shifting .
EAU16691To start out an d accelerate
1. Pull the clutch lever to disengage the clutch.
2. Shift the transmission into first gear.
3. Open the throttle gradually and si- multaneously release the clutch
lever slowly.
4. Once the motorcycle has reached a speed high enough to change
gears, close the throttle, and at the
same time, quickly pull the clutch
lever in.
5. Shift the transmission into second gear. (Make sure not to shift the
transmission into the neutral posi-
tion.)
6. Open the throttle halfway and gradually release the clutch lever.
7. Follow the same procedure when
shifting to the next gear.
EAU16711To decelerate
1. Close the throttle and apply both the front and the rear brakes to
slow the motorcycle.
2. Downshift through the gears and shift the transmission into the neu-
tral position when the motorcycle
is almost completely stopped.
EAU41506
Engine break-in
WARNING
EWA10322
Failure to properly maintain the vehi-
cle or performin g maintenance ac-
tivities incorrectly may increase
your risk of injury or death durin g
service or while usin g the vehicle. If
you are not familiar with vehicle ser-
vice, have a Yamaha d ealer perform
service.
TIP
Before starting the engine for the first
time, the air filter must be lubricated.
(See page 7-10.)
En gine break-in proce dure
1. Fill the fuel tank with a break-in oil- fuel mixture as follows.
2. Start and warm up the engine. Check the operation of the con-
trols and the engine stop switch.
(See page 4-1.)
3. Operate the motorcycle in the low- er gears at moderate throttle
openings for 5 to 8 minutes. Stop
the engine and check the spark
plug condition (see page 7-6); it
will show a rich condition during
break-in.
4. Allow the engine to cool. Restart the engine and operate the motor-
cycle as in the step above for 5
minutes. Then, very briefly shift to
Recommen ded 2-stroke en gine oil:
YAMALUBE 2R
Mixin g ratio ( gasoline to oil):
15:1
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Periodic maintenance an d a djustment
7-1
7
EAU42074
Periodic inspection, adjustment, and
lubrication will keep your vehicle in the
safest and most efficient condition
possible. Safety is an obligation of the
vehicle owner/operator. The most im-
portant points of vehicle inspection,
adjustment, and lubrication are ex-
plained 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, geographical location,
and individual use, the maintenance in-
tervals may need to be shortened.
WARNING
EWA10322
Failure to properly maintain the vehi-
cle or performin g maintenance ac-
tivities incorrectly may increase
your risk of injury or d eath durin g
service or while usin g the vehicle. If
you are not familiar with vehicle ser-
vice, have a Yamaha d ealer perform
service.
WARNING
EWA15123
Turn off the en gine when performin g
maintenance unless otherwise
specified .
 A runnin g en gine has movin g
parts that can catch on body
parts or clothin g an d electrical
parts that can cause shocks or
fires.
 Runnin g the en gine while ser-
vicin g can lead to eye injury,
b urns, fire, or car bon monoxi de
poisonin g – possi bly lea din g to d
eath. See pag e 2-2 for more in-
formation a bout car bon monox-
i d e.
WARNING
EWA15461
Brake discs, calipers, drums, an d
linin gs can b ecome very hot during
use. To avoi d possi ble burns, let
b rake components cool before
touchin g them.
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Periodic maintenance an d a djustment
7-5
7
EAU42012
TIP
 Hydraulic brake service
• Regularly check and, if necessary, correct the brake fluid levels.
• Every two years replace the internal components of the brake master cyl- inders and calipers, and change the brake fluid.
• Replace the brake hoses every four years and if cracked or damaged.
NO. ITEM ROUTINEAfter
break-in
Everyrace
Every
third race
Every
fifth race
As
required
24 *Shock absorber
assembly Check operation and adjust. Tighten if necessary.
Lubricate with lithium-soap-based
grease.

25 *Drive chain roller
and support guide Check for wear or damage. Replace if necessary.
26
*Rear suspension Check operation and tighten if
necessary.
Lubricate with lithium-soap-basedgrease.
Check operation, free play, andtighten if necessary.
27 *
Steering head Clean and lubricate with
lithium-soap-based grease.
Replace bearings. Check tire air pressure, wheel runout,spokes for looseness, and tires for
wear.

Tighten sprocket bolts if necessary.
28 *Tires and wheels
Check wheel bearings for looseness. Lubricate wheel bearings with
lithium-soap-based grease.
Replace wheel bearings.
29 *Moving parts and ca-
bles Lubricate.
30 *
Throttle grip Check operation. Check throttle grip free play, and
adjust if necessary.
Lubricate cable and grip housing.
After washing the motorcycle or riding in the rain.
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Periodic maintenance an d a djustment
7-10
7
6. Pour the recommended coolant
into the radiator until it is full.
7. Install the radiator cap, start the engine, let it idle for several min-
utes, and then turn it off.
8. Remove the radiator cap to check the coolant level in the radiator. If
necessary, add sufficient coolant
until it reaches the bottom of the
radiator filler neck, and then install
the radiator cap.
9. Start the engine, and then check the vehicle for coolant leakage. If
coolant is leaking, have a Yamaha
dealer check the cooling system.
EAU84100
Cleanin g the air filter element
Clean or replace the air filter element at
the intervals specified in the periodic
maintenance and lubrication chart.
Service the air filter element more fre-
quently if you often ride in wet or dusty
conditions.
1. Remove the seat. (See page 4-8.)
2. Remove the air filter element by removing the wing bolt and its
washer.
3. Remove the sponge material from the air filter element frame.
4. Clean the sponge material with solvent or YAMALUBE foam air fil-
ter cleaner, and then squeeze out
the remaining liquid.
Antifreeze/water mixture ratio:1:1
Recommen ded antifreeze:
High-quality ethylene glycol anti-
freeze containing corrosion inhibi-
tors for aluminum engines
Coolant quantity:
Radiator (including all routes):0.38 L (0.40 US qt, 0.33 Imp.qt)
1. Wing bolt
2. Washer
3. Air filter element
1. Sponge material
2. Air filter element frame
1
2
3
1
2
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Periodic maintenance an d a djustment
7-12
7
EAU42111
A djustin g the car buretor
The carburetor is an important part of
the engine and requires very sophisti-
cated adjustment. Therefore, most
carburetor adjustments should be left
to a Yamaha dealer, who has the nec-
essary professional knowledge and ex-
perience. The adjustment described in
the following section, however, may be
serviced by the owner as part of rou-
tine maintenance.
NOTICE
ECA10551
The car buretor has been set an d ex-
tensively teste d at the Yamaha fac-
tory. Chan gin g these settin gs
without sufficient technical knowl-
e dge may result in poor perfor-
mance of or damag e to the en gine.
EAU44391
A djustin g the en gine i dlin g
spee d
The engine idling speed must be ad-
justed when necessary.
1. Start the engine and thoroughly warm it up.
2. Turn the throttle stop screw until the engine runs at the lowest pos-
sible speed.
3. To increase the engine idling speed, turn the throttle stop screw
in direction (a). To decrease the
engine idling speed, turn the throt-
tle stop screw in direction (b).
1. Throttle stop screw
1
(b)(a)
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Periodic maintenance an d a djustment
7-22
7
TIP
Using the alignment marks on the drive
chain pullers and the notch on each
side of the swingarm, make sure that
both drive chain pullers are in the same
position for proper wheel alignment.
3. Tighten both locknuts and the axle
nut to the 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.
EAU23018
Cleanin g an d lu bricatin g the
d rive chain
The 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 b e lubricated
after washin g the motorcycle, ri din g
in the rain or ri din g in wet areas.
1. Remove all dirt and mud from the
drive chain with a brush or cloth.
TIP
For a thorough cleaning, have a
Yamaha dealer remove the drive chain and soak it in solvent.
2. Spray Yamaha chain lubricant or other suitable chain lubricant on
the entire chain, making sure that
all side plates and rollers have
been sufficiently oiled.
1. Notch
2. Alignment mark
3. Drive chain puller
Tightening torques:
Locknut: 21 N·m (2.1 kgf·m, 15 lb·ft)
Axle nut:
80 N·m (8.0 kgf·m, 59 lb·ft)
12
3
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Periodic maintenance an d a djustment
7-30
7
TIP
Make sure the slot in the brake caliper
bracket is fit over the retainer on the
swingarm.
3. Install the drive chain onto the rear
sprocket.
4. Install the washer and axle nut.
5. Adjust the drive chain slack. (See page 7-21.)
EAU25872
Trou bleshootin g
Although Yamaha motorcycles receive
a thorough inspection before shipment
from the factory, trouble may occur
during operation. Any problem in the
fuel, compression, or ignition systems,
for example, can cause poor starting
and loss of power.
The following troubleshooting charts
represent quick and easy procedures
for checking these vital systems your-
self. However, should your motorcycle
require any repair, take it to a Yamaha
dealer, whose skilled technicians have
the necessary tools, experience, and
know-how to service the motorcycle
properly.
Use only genuine Yamaha replace-
ment parts. Imitation parts may look
like Yamaha parts, but they are often
inferior, have a shorter service life and
can lead to expensive repair bills.
WARNING
EWA15142
When checkin g the fuel system, do
not smoke, an d make sure there are
no open flames or sparks in the ar-
ea, inclu din g pilot li ghts from water
heaters or furnaces. Gasoline or
g asoline vapors can i gnite or ex-
plo de, causin g severe injury or prop-
erty damag e.
1. Retainer
2. Slot
1
2
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