2012 YAMAHA JOG50R engine

EAU17281
Periodic inspection, adjustment, and
lubrication will keep your vehicle in
the safest and most efficient condi-
tion possible. Safety is an obligation
of the vehicle owner/operator. The
most important points of vehicle ins-
pection, 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
general guide under normal riding
conditions. However, depending on
the weather, terrain, geographical
location, and individual use, the main-
tenance intervals may need to be
shortened.
EWA10321
sWARNING
Failure to properly maintain the
vehicle or performing maintenance
activities incorrectly may increase
your risk of injury or death during
service or while using the vehicle. If
you are not familiar with vehicle
service, have a Yamaha dealer per-
form service.
EWA15121
sWARNING
Turn off the engine when perfor-
ming maintenance unless otherwi-
se specified.
●A running engine has moving
parts that can catch on body
parts or clothing and electrical
parts that can cause shocks or
fires.
●Running the engine while servi-
cing can lead to eye injury,
burns, fire, or carbon monoxide
poisoning – possibly leading to
death. See page 1-1 for more
information about carbon
monoxide.
EWA10330
sWARNING
This scooter is designed for use on
paved roads only. If this scooter is
operated in abnormally dusty,
muddy or wet conditions, the air fil-
ter element should be cleaned or
replaced more frequently, otherwi-
se rapid engine wear may result.
Consult a Yamaha dealer for proper
maintenance intervals.
PERIODIC MAINTENANCE AND ADJUSTMENT
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PERIODIC MAINTENANCE AND ADJUSTMENT
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6
ODOMETER READING
CHECK OR ANNUAL
NO. ITEM MAINTENANCE JOB
1000 km 6000 km 12000 km 18000 km 24000 kmCHECK
(600 mi) (3500 mi) (7000 mi) (10500 mi) (14000 mi)
7*Wheels• Check runout and for damage.√√√ √
• Check tread depth and for damage.
8*Tires• Replace if necessary.
√√√ √√
• Check air pressure.
• Correct if necessary.
9*Wheel bearings• Check bearing for looseness
or damage.√√√ √
• Check bearing play and steering
10 *Steering bearingsfor roughness.√√ √√ √
• Lubricate with lithium-soap-
based grease.Every 24000 km (14000 mi)
11 *Chassis fasteners• Make sure that all nuts, bolts and
screws are properly tightened.√√√ √√
12Front brake lever
pivot shaft• Lubricate with silicone grease.√√√ √√
13Rear brake lever • Lubricate with lithium-soap-
pivot shaftbased grease.√√√ √√
14Centerstand• Check operation.
• Lubricate.√√√ √√
15 *Front fork• Check operation and for oil
leakage.√√√ √
16 *Shock absorber • Check operation and shock
assemblyabsorber for oil leakage.√√√ √
17 *Carburetor• Adjust engine idling speed.√√ √√ √ √
18 *Autolube pump• Check operation.
• Bleed if necessary.√√ √√

EAUM1250
Panel A
T
o remove the panel
1. Open the storage compartment.
(See page 3-11).
2. Remove the screw, and then take
the panel off.
1. Screw
2. Panel A
To install the panel
1. Place the panel in the original
position, and then install the
screw.
2. Close the storage compartment.
EAU19622
Checking the spark plug
The spark plug is an important engine
component, which should be chec-
ked periodically, preferably by a
Yamaha dealer. Since heat and depo-
sits will cause any spark plug to
slowly erode, it should be removed
and checked in accordance with the
periodic maintenance and lubrication
chart. In addition, the condition of the
spark plug can reveal the condition of
the engine.
The porcelain insulator around the
center electrode of the spark plug
should be a medium-to-light tan (the
ideal color when the vehicle is ridden
normally). If the spark plug shows a
distinctly different color, the engine
could be operating improperly. Do not
attempt to diagnose such problems
yourself. Instead, have a Yamaha
dealer check the vehicle.
If the spark plug shows signs of elec-
trode erosion and excessive carbon
or other deposits, it should be repla-
ced.Before installing a spark plug, the
spark plug gap should be measured
with a wire thickness gauge and, if
necessary, adjusted to specification.
1. Spark plug gap
Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the
spark plug threads.
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
1
ZAUM0037
Specified spark plug:
NBR8HS/NGK (for CS50 CS50Z)
BPR4HS/NGK (for CS50M)
1
2
PERIODIC MAINTENANCE AND ADJUSTMENT
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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. Howe-
ver, the spark plug should be tighte-
ned to the specified torque as soon
as possible.
EAU20064
Final transmission oil
The final transmission case must be
checked for oil leakage before each
ride. If any leakage is found, have a
Yamaha dealer check and repair the
scooter. In addition, the final trans-
mission oil must be changed as
follows at the intervals specified in the
periodic maintenance and lubrication
chart.
1. Start the engine, warm up the
final transmission oil by riding the
scooter for several minutes, and
then stop the engine.
2. Place the scooter on the centers-
tand.
3. Place an oil pan under the final
transmission case to collect the
used oil.
4. Remove the final transmission oil
filler cap and final transmission
drain bolt to drain the oil from the
final transmission case.
1. Final transmission oil filler cap
5. Install the final transmission oil
drain bolt, and then tighten it to
the specified torque.
1. Final transmission oil drain bolt
1
1
11Tightening torque:
Spark plug:
20 Nm (2.0 m•kgf, 14.5 ft•lbf)
PERIODIC MAINTENANCE AND ADJUSTMENT
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6. Refill with the specified amount
of the recommended final trans-
mission oil, and then install and
tighten the oil filler cap. WAR-
NING! Make sure that no
foreign material enters the final
transmission case. Make sure
that no oil gets on the tire or
wheel.
[EWA11311]
7. Check the final transmission case
for oil leakage. If oil is leaking,
check for the cause.
EAUS1200
Coolant (CS50Z)
The coolant level should be checked
before each ride. In addition, the coo-
lant must be changed at the intervals
specified in the periodic maintenance
and lubrication chart.
EAUM2102
To check the coolant level
1. Place the vehicle on a level surfa-
ce and hold it in an upright posi-
tion.
TIP
●The coolant level must be chec-
ked on a cold engine since the
level varies with engine tempera-
ture.
●Make sure that the vehicle is
positioned straight up when
checking the coolant level. A
slight tilt to the side can result in
a false reading.
2. Check the coolant level through
the check window.
TIP
The coolant should be between the
minimum and maximum level marks.
1. Coolant level check window
2. Maximum level mark
3. Minimum level mark
3. If the coolant is at or below the
minimum level mark, remove the
cowling A. (See page 6-5).
4. Open the reservoir cap, and then
add coolant to the maximum
level mark. WARNING! Remove
only the coolant reservoir cap.
Never attempt to remove the
radiator cap when the engine is
hot.
[EWA15161]. NOTICE: If coolant
is not available, use distilled
MAX
MIN2
3
1
Recommended final transmission
oil:
See page 8-1
Oil quantity:
0.11 L (0.12 US qt, 0.10 Imp.qt)
Tightening torque:
Final transmission oil drain bolt:
18 Nm (1.8 m•kgf, 13.0 ft•lbf)
PERIODIC MAINTENANCE AND ADJUSTMENT
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water or soft tap water instead.
Do not use hard water or salt
water since it is harmful to the
engine. If water has been used
instead of coolant, replace it
with coolant as soon as possi-
ble, otherwise the cooling sys-
tem will not be protected
against frost and corrosion. If
water has been added to the
coolant, have a Yamaha dealer
check the antifreeze content of
the coolant as soon as possi-
ble, otherwise the effective-
ness of the coolant will be
reduced.
[ECA10472]
1. Coolant reservoir cap
2. Maximum level mark
3. Minimum level mark
5. Close the reservoir cap, and then
install the cowling.
EAU33031
Changing the coolant
The coolant must be changed at the
intervals specified in the periodic
maintenance and lubrication chart.
Have a Yamaha dealer change the
coolant. WARNING! Never attempt
to remove the radiator cap when
the engine is hot.
[EWA10381]EAU40370
Air filter element
The air filter element must be cleaned
and replaced at the intervals specified
in the periodic maintenance and lubri-
cation chart. Have a Yamaha dealer
clean and replace the air filter ele-
ment.
Coolant reservoir capacity:
0.25 L (0.26 US qt, 0.22 Imp.qt)
1
2
3FULL
LOW
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EAU21300
Adjusting the carburetor
The carburetor is an important part of
the engine and requires very sophisti-
cated adjustment. Therefore, all car-
buretor adjustments should be left to
a Yamaha dealer, who has the neces-
sary professional knowledge and
experience.
EAU21370
Adjusting the throttle cable
free play
1. Throttle cable free play
The throttle cable free play should
measure 2.0–5.0 mm (0.08–0.20 in) at
the throttle grip. Periodically check
the throttle cable free play and, if
necessary, adjust it as follows.
TIP
The engine idling speed must be
correctly adjusted before checking
and adjusting the throttle cable free
play.
1. Loosen the locknut.2. To increase the throttle cable free
play, turn the adjusting nut in
direction (a). To decrease the
throttle cable free play, turn the
adjusting nut in direction (b).
1. Locknut
2. Adjusting nut
3. Tighten the locknut.
1
2
a
b
1
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EAU25922
Troubleshooting charts
Starting problems or poor engine performance
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
WetOpen the throttle halfway and operate
the electric starter.
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