2003 YAMAHA SLIDER 50 recommended oil

3
INSTRUMENT AND CONTROL FUNCTIONS
1
a
b
ZAUM0309
EAU03098
Catalytic converter
This scooter is equipped with a catalytic
converter in the muffler.
EW000128
The exhaust system is hot after
operation. Make sure that the
exhaust system has cooled down
before doing any maintenance work.
EC000114
The following precautions must be
observed to prevent a fire hazard or
other damages.
•Use only unleaded gasoline.
The use of leaded gasoline will
cause unrepairable damage to
the catalytic converter.
•Never park the scooter near
possible fire hazards such as
grass or other materials that
easily burn.
•Do not allow the engine to idle
too long.
EAU03750
2-stroke engine oil
Make sure that there is sufficient oil in
the 2-stroke engine oil tank. Add the
recommended 2-stroke engine oil if
necessary.
NOTE :
Make sure that the 2-stroke engine oil
tank cap is properly installed.
Recommended oil:
Yamalube 2 or equivalent 2-
stroke engine oil (JASO grade
"FC", or ISO grades "EG-C" or
"EG-D")
Oil quantity:
1.3 L1. Starter (choke) lever “”
EAU03839
Starter (choke) lever “”
Starting a cold engine requires a richer
air-fuel mixture, which is supplied by the
starter (choke).
Move the lever in direction a to turn
on the starter (choke).
Move the lever in direction b to turn
off the starter (choke).
3-7

PRE-OPERATION CHECKS
4The condition of a vehicle is the owner’s responsibility. Vital components can start to deteriorate quickly and unexpectedly,
even if the vehicle remains unused (for example, as a result of exposure to the elements). Any damage, fluid leakage or
loss of tire air pressure could have serious consequences. Therefore, it is very important, in addition to a thorough visual
inspection, to check the following points before each ride.
ITEM CHECKS PAGE
• Check fuel level in fuel tank.
Fuel• Refuel if necessary.3-6
• Check fuel line for leakage.
• Check oil level in oil tank.
Two-stroke engine oil• If necessary, add recommended oil to specified level. 3-7
• Check vehicle for oil leakage.
Final transmission oil• Check oil level and vehicle for oil leakage. 6-6
• Check operation.
• If soft or spongy, have Yamaha dealer bleed hydraulic system.
Front brake• Check fluid level in reservoir. 3-4, 6-11
• If necessary, add recommended brake fluid to specified level.
• Check hydraulic system for leakage.
• Check operation.
Rear brake• Check lever free play. 3-5, 6-11
• Adjust if necessary.
• Make sure that operation is smooth.
Throttle grip• Check cable free play.
6-8
• If necessary, have Yamaha dealer adjust cable free play
and lubricate cable and grip housing.
EAU03439
Pre-operation check list
4-1

PERIODIC MAINTENANCE AND MINOR REPAIR
6
12
ZAUM0153
1. Final transmission oil drain bolt
2. Final transmission oil filler cap
EAU04228
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 transmis-
sion oil must be changed as follows at
the intervals specified in the periodic
maintenance and lubrication chart.
1. Start the engine, warm it up by
riding the scooter for several mi-
nutes, and then stop the engine.
2. Place the scooter on the
centerstand.3. Place an oil pan under the final
transmission case to collect the
used oil.
4. Remove the oil filler cap and drain
bolt to drain the oil from the final
transmission case.
5. Install the final transmission oil
drain bolt, and then tighten it to
the specified torque.
Tightening torque:
Final transmission oil drain bolt:
17 Nm (1.7 m
•kgf)
6. Add the specified amount of the
recommended final transmission
oil, and then install and tighten the
oil filler cap.
Recommended final transmission oil:
See page 8-1.
Oil quantity:
0.11 L
EWA00062
•Make sure that no foreign
material enters the final trans-
mission case.
•Make sure that no oil gets on
7. Check the final transmission case
for oil leakage. If oil is leaking,
check for the cause.
6-6

PERIODIC MAINTENANCE AND MINOR REPAIR
6
1
ZAUM0170
1
ZAUM0318
1
4 32
ZAUM0156
1. Air filter case cover1. Air filter element
EAUM0071
Cleaning the air filter element
The air filter element should be cleaned
at the intervals specified in the periodic
maintenance and lubrication chart.
Clean the air filter element more
frequently if you are riding in unusually
wet or dusty areas.
1. Remove the air filter case cover
by removing the screws.2. Pull the air filter element out, clean
it with solvent, and then squeeze
the remaining solvent out.
EW000075
Use only a dedicated parts cleaning
solvent. To avoid the risk of fire or
explosion, do not use gasoline or
solvents with a low flash point.
EC000089
To avoid damaging the foam material,
handle it gently and carefully, and do
not twist or wring it.3. Apply oil of the recommended
type to the entire surface of the
element, and then squeeze the
excess oil out.
NOTE :
The air filter element should be wet but
not dripping.
Recommended oil:
Engine oil
6-7

PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAU04502
Rear brake shoes
The rear brake is provided with a wear
indicator, which allows you to check the
brake shoe wear without having to
disassemble the brake. To check the
brake shoe wear, check the position of
the wear indicator while applying the
brake. If a brake shoe has worn to the
point that the wear indicator reaches
the wear limit line, have a Yamaha dea-
ler replace the brake shoes as a set.
1
2
ZAUM0059
1. Wear indicator
2. Wear limit
1
ZAUM0158
1. Minimum level mark
6-13
EAU00732
Checking the brake fluid level
Insufficient brake fluid may allow air to
enter the brake system, possibly causing
it to become ineffective.
Before riding, check that the brake fluid
is above the minimum level mark and
replenish if necessary. A low brake fluid
level may indicate worn brake pads and/
or brake system leakage. If the brake
level is low, be sure to check the brake
pads for wear and the brake system for
leakage.Observe these precautions:
•When checking the fluid level,
make sure that the top of the
master cylinder is level by turning
the handlebars.
•Use only the recommended quality
brake fluid, otherwise the rubber
seals may deteriorate, causing
leakage and poor braking perfor-
mance.
Recommended brake fluid:
DOT 4
NOTE :
If DOT 4 is not available, DOT 3 can be
used.
•Refill with the same type of brake
fluid. Mixing fluids may result in a
harmful chemical reaction and lead
to poor braking performance.
•Be careful that water does not en-
ter the master cylinder when
refilling. Water will significantly
lower the boiling point of the fluid
and may result in vapor lock.

PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAUM0008
Changing the brake fluid
Have a Yamaha dealer change the
brake fluid at the intervals specified in
the periodic maintenance and
lubrication chart. In addition, have the
brake hose replaced every four years
or whenever it is damaged or leaking.
EAU02962
Checking and lubricating the
cables
The operation of all control cables and
the condition of the cables should be
checked before each ride, and the
cables and cable ends should be
lubricated if necessary. If a cable is
damaged or does not move smoothly,
have a Yamaha dealer check or replace
it.
Recommended lubricant:
Engine oil
EW000112
Damage to the outer sheath may
interfere with proper cable operation
and will cause the inner cable to
rust. Replace a damaged cable as
soon as possible to prevent unsafe
conditions.
6-14
•Brake fluid may deteriorate painted
surfaces or plastic parts. Always
clean up spilled fluid immediately.
•As the brake pads wear, it is nor-
mal for the brake fluid level to
gradually go down. However, if the
brake fluid level goes down
suddenly, have a Yamaha dealer
check the cause.

SCOOTER CARE AND STORAGE
7After cleaning
1. Dry the scooter with a chamois or
an absorbing cloth.
2. Use a chrome polish to shine
chrome, aluminum and stainless-
steel parts, including the exhaust
system. (Even the thermally
induced discoloring of stainless-
steel exhaust systems can be
removed through polishing.)
3. To prevent corrosion, it is
recommended to apply a corro-
sion protection spray on all metal,
including chrome- and nickel-
plated, surfaces.
4. Use spray oil as a universal
cleaner to remove any remaining
dirt.
5. Touch up minor paint damage
caused by stones, etc.
6. Wax all painted surfaces.
7. Let the scooter dry completely
before storing or covering it.
EWA00002
•Make sure that there is no oil
or wax on the brakes or tires. If
necessary, clean the brake
discs and brake linings with a
regular brake disc cleaner or
acetone, and wash the tires
with warm water and a mild
detergent.
•Before operating the scooter
test its braking performance
and cornering behavior.
ECA00013
•Apply spray oil and wax
sparingly and make sure to
wipe off any excess.
•Never apply oil or wax to any
rubber and plastic parts, but
treat them with a suitable care
product.
•Avoid using abrasive polishing
compounds as they will wear
away the paint.
NOTE :
Consult a Yamaha dealer for advice on
what products to use.
7-3

SPECIFICATIONS
8
8-1 Model EW50
Dimensions:
Overall length 1,785 mm
Overall width 668 mm
Overall height 1,077 mm
Seat height 787 mm
Wheelbase 1,202 mm
Minimum ground clearance 185 mm
Minimum turning radius 1,800 mm
Weight:
Wet (with oil and a full fuel tank) 81 kg
Engine:
Engine type Air cooled, 2strokes
Cylinder arrangement Single cylinder, vertical
Displacement 49.2 cc
Bore x stroke 40.0 x 39.2 mm
Compression ratio 11.2:1
Starting system type Electric and kick starter
Lubrication system Separate lubrication
(Autolube)
Engine oil:
Type Yamalube 2
or 2 strokes engine oil
Classification Jaso FC or ISO EG-C, EG-D
Quantity 1.3 LFinal transmission oil:
Type SAE 10W30 type SE
Capacity 0.11L
Air filter type:Wet type element
Fuel:
Recommended fuel Regular unleaded gasoline
(RON 91 mini)
Fuel tank capacity 6.5 L
Carburetor:
Type/quantity TK ø12
Manufacturer TEIKEI
Spark plug:
Type / Manufacturer BR8HS / NGK or BR9HS/NGK
Spark plug gap 0.5—0.7 mm
Clutch type:Dry, centrifugal automatic
Transmission:
Primary reduction system Helical gear
Primary reduction ratio 52/13 (4.000)
Secondary reduction system Spur gear
Secondary reduction ratio 42/13 (3.230)
Transmission type V-belt automatic
Operation Centrifugal automatic type
Chassis:
Frame type Steel tube underbone
Caster angle 27°
Trail 90 mm
Specifications