YAMAHA JOG50R 2008 Workshop Manual

EAU22720
Changing the brake fluid
Have a Yamaha dealer change the
brake fluid at the intervals specified in
the NOTE after the periodic mainte-
nance and lubrication chart. In addi-
tion, have the oil seals of the brake
master cylinder and caliper as well as
the brake hose replaced at the inter-
vals listed below or whenever they are
damaged or leaking.
●Oil seals: Replace every two
years.
●Brake hose: Replace every four
years.
EAU23111
Checking and lubricating the
throttle grip and cable
The operation of the throttle grip
should be checked before each ride.
In addition, the cable should be lubri-
cated at the intervals specified in the
periodic maintenance chart.
EAU43640
Lubricating the front and
rear brake levers
The pivoting points of the front and
rear brake levers must be lubricated at
the intervals specified in the periodic
maintenance and lubrication chart.
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EAU23191
Checking and lubricating the
centerstand
1. Centerstand
The operation of the centerstand
should be checked before each ride,
and the pivots and metal-to-metal
contact surfaces should be lubricated
if necessary.
EWA11300
s s
WARNING
If the centerstand does not move
up and down smoothly, have a
Yamaha dealer check or repair it.
EAU23271
Checking the front fork
The condition and operation of the
front fork must be checked as follows
at the intervals specified in the perio-
dic maintenance and lubrication
chart.
To check the condition
EWA10750
s s
WARNING
Securely support the vehicle so
that there is no danger of it falling
over.
Check the inner tubes for scratches,
damage and excessive oil leakage.
To check the operation
1. Place the vehicle on a level surfa-
ce and hold it in an upright posi-
tion.
2. While applying the front brake,
push down hard on the handle-
bars several times to check if the
front fork compresses and
rebounds smoothly.
Recommended lubricant:
Lithium-soap-based grease
(all-purpose grease)
Recommended lubricants:
Front brake lever:
Silicone grease
Rear brake lever:
Lithium-soap-based grease
(all-purpose grease)
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ECA10590
CAUTION:
If any damage is found or the front
fork does not operate smoothly,
have a Yamaha dealer check or
repair it.
EAU23280
Checking the steering
Worn or loose steering bearings may
cause danger. Therefore, the opera-
tion of the steering must be checked
as follows at the intervals specified in
the periodic maintenance and lubrica-
tion chart. 1. Place a stand under the engine to raise the front wheel off the
ground.
EWA10750
s s WARNING
Securely support the vehicle so
that there is no danger of it falling
over.
2. Hold the lower ends of the front fork legs and try to move them
forward and backward. If any free
play can be felt, have a Yamaha
dealer check or repair the stee-
ring.

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EAU23290
Checking the wheel bearings
The front and rear wheel bearings
must be checked at the intervals spe-
cified in the periodic maintenance and
lubrication chart. If there is play in the
wheel hub or if the wheel does not
turn smoothly, have a Yamaha dealer
check the wheel bearings.
EAU23390
Battery
1. Battery
The battery is located behind panel A.
(See page 6-5.)
This model is equipped with a sealed-
type (MF) battery, which does not
require any maintenance. There is no
need to check the electrolyte or to
add distilled water.
To charge the battery
Have a Yamaha dealer charge the
battery as soon as possible if it seems
to have discharged. Keep in mind that
the battery tends to discharge more
quickly if the vehicle is equipped with
optional electrical accessories.
EWA10760
s s
WARNING
●Electrolyte is poisonous and
dangerous since it contains
sulfuric acid, which causes
severe burns. Avoid any con-
tact with skin, eyes or clothing
and always shield your eyes
when working near batteries.
In case of contact, administer
the following FIRST AID.
• EXTERNAL: Flush with plenty
of water.
• INTERNAL: Drink large quan-
tities of water or milk and
immediately call a physician.
• EYES: Flush with water for 15
minutes and seek prompt
medical attention.
●Batteries produce explosive
hydrogen gas. Therefore, keep
sparks, flames, cigarettes, etc.,
away from the battery and provi-
de sufficient ventilation when
charging it in an enclosed space.
●KEEP THIS AND ALL BATTE-
RIES OUT OF THE REACH OF
CHILDREN.
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To store the battery
1. If the model will not be used for
more than one month, remove
the battery, fully charge it, and
then place it in a cool, dry place.
2. If the battery will be stored for
more than two months, check it
at least once a month and fully
charge it if necessary.
3. Fully charge the battery before
installation.
4. After installation, make sure that
the battery leads are properly con-
nected to the battery terminals.
ECA10630
CAUTION:
●Always keep the battery char-
ged. Storing a discharged bat-
tery can cause permanent bat-
tery damage.
●To charge a sealed-type (MF)
battery, a special (constant-
voltage) battery charger is
required. Using a conventional
battery charger will damage
the battery. If you do not have
access to a sealed-type (MF)
battery charger, have a Yamaha
dealer charge your battery.
EAUS1180
Replacing the fuse
The fuse holder is located beside the
battery case.
If the fuse is blown, replace it as
follows.
1. Turn the key to “e” and turn off
all electrical circuits.
2. Remove the blown fuse, and then
install a new fuse of the specified
amperage.
1. Main fuse
ECA10640
CAUTION:
Do not use a fuse of a higher ampe-
rage rating than recommended to
avoid causing extensive damage to
the electrical system and possibly a
fire.
3. Turn the key to “f” and turn on
the electrical circuits to check if
the devices operate.
4. If the fuse immediately blows
again, have a Yamaha dealer
check the electrical system.
Specified fuse:
7.5 A
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EAUS1430
Replacing the headlight bulb
or a front turn signal light
bulb
If a bulb burns out, replace it as
follows.
ECA10670
CAUTION:
It is advisable to have a Yamaha
dealer perform this job.
Headlight bulb
1. Remove cowling A.
2. Disconnect the headlight leads,
and then unhook the headlight
bulb holder as shown.
1. Headlight couplers
2. Headlight bulb holder
3. Remove the bulb holder by
pulling it and then, remove the
defective bulb by turning it coun-
terclockwise.
1. Bulb holder
2. Push in and turn counterclockwise.
3. Remove the bulb.
4. Headlight bulb
EWA10790
s s
WARNING
Headlight bulbs get very hot. The-
refore, keep flammable products
away from a lit headlight bulb, and
do not touch the bulb until it has
cooled down.
4. Insert a new headlight bulb into
the bulb holder and turn it clock-
wise.
5. Place the bulb holder in its origi-
nal position, and then secure it
with its holder as shown.
6. Connect the headlight leads and
install the cowling.
7. Have a Yamaha dealer adjust the
headlight beam if necessary.
GGYYBB
1 2
3
4
GYB
1
2
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Left turn signal light bulb
1. Remove cowling A.
2. Remove the socket (together
with the bulb) by turning it coun-
terclockwise.
1. Socket
3. Remove the defective bulb from
the socket by pulling it out.
1. Turn signal light bulb
4. Insert a new bulb into the socket.
5. Install the socket by turning it
clockwise.
6. Install the cowling.
Right turn signal light bulb
1. Remove cowling A.
2. Remove the socket (together
with the bulb) by turning it clock-
wise.
1. Socket
3. Remove the defective bulb from
the socket by pulling it out.
4. Insert a new bulb into the socket.
5. Install the socket by turning
counterclockwise.
6. Install the cowling.
EAUS1250
Replacing the tail/brake light
bulb or a rear turn signal
light bulb
Tail/brake light bulb
1. Remove the tail/brake light bulb
lens by removing the screws.
1. Screws
2. Tail/brake light lens
2. Remove the defective bulb by
pushing it in and turning it coun-
terclockwise.
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1. Tail/brake light bulb
3. Insert a new bulb into the socket,
push it in, and then turn it clock-
wise until it stops.
4. Install the lens by installing the
screws.
Rear turn signal light bulb
1. Remove the tail/brake light lens
by removing the screw.
2. Remove the turn signal light bulb
lens by removing the screw.
1. Screw
2. Rear turn signal light bulb lens
3. Rear turn signal light bulb
3. Remove the defective bulb by
pushing it in and turning it coun-
terclockwise.
4. Insert a new bulb into the socket,
push it in, and then turn it clock-
wise until it stops.
5. Install the turn signal light bulb
lens by installing the screw.
6. Install the tail/brake light bulb
lens by installing the screw.
ECA10680
CAUTION:
Do not overtighten the screws,
otherwise the lens may break.
EAUS1410
Replacing an auxiliary light
bulb
This model is equipped with two auxi-
liary lights. If an auxiliary light bulb
burns out, replace it as follows.
1. Remove cowling A. (See page
6-5.)
2. Remove the auxiliary light socket
(together with the bulb) by pulling
it out.
1. Auxiliary light bulb socket
3. Remove the defective bulb by
pulling it out.
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1. Auxiliary light bulb
4. Insert a new bulb into the socket.
5. Install the auxiliary light socket
(together with the bulb) by pus-
hing it in.
6. Install the cowling.
EAU25880
Troubleshooting
Although Yamaha scooters receive a
thorough inspection before shipment
from the factory, trouble may occur
during operation. Any problem in the
fuel, compression, or ignition sys-
tems, 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 scooter
require any repair, take it to a Yamaha
dealer, whose skilled technicians
have the necessary tools, experience,
and know-how to service the scooter
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.
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EAU25921
Troubleshooting charts
Starting problems or poor engine performanceEWA10840
s s
WARNING
Keep away open flames and do not smoke while checking or working on the fuel system.
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Check the fuel level in
the fuel tank.
1. FuelThere is enough fuel.
There is no fuel.Check the compression.
Supply fuel.
The engine does not start.
Check the compression.
Operate the electric starter.
2. CompressionThere is compression.
There is no compression.Check the ignition.
Have a Yamaha dealer
check the vehicle.
Remove the spark plug
and check the electrodes.
3. IgnitionWipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug.
Have a Yamaha dealer check the vehicle.
The engine does not start.
Have a Yamaha dealer
check the vehicle.
The engine does not start.
Check the battery.
Operate the electric starter.
4. BatteryThe engine turns over
quickly.
The engine turns over
slowly.The battery is good.
Check the battery lead connections,
and charge the battery if necessary.
Dry
We tOpen the throttle halfway and operate
the electric starter.
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