Page 65 of 114
6-15
PERIODIC MAINTENANCE AND MINOR REPAIR
63. Wait a few minutes until the oil
settles, remove the oil filler cap,
wipe the dipstick clean, insert it
back into the oil filler hole (with-
out screwing it in), and then
remove it again to check the oil
level.
NOTE:
The engine oil should be between the
minimum and maximum level marks.
3121
1. Engine oil filler cap
2. Maximum level mark
3. Minimum level mark
To change the engine oil
1. Start the engine, warm it up for
several minutes, and then turn it
off.
2. Place an oil pan under the
engine to collect the used oil.
3. Remove the engine oil filler cap
and the engine oil drain bolt to
drain the oil from the crankcase.
1
1. Engine oil drain bolt
4. If the engine oil is below the min-
imum level mark, add sufficient
oil of the recommended type to
raise it to the correct level.
5. Insert the dipstick into the oil filler
hole, and then tighten the oil filler
cap.
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6-21
PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAU03627
Air filter and V-belt case air
filter elementsAir filter and V-belt case air filter elements, cleaningThe air filter and V-belt case air filter
elements should be cleaned at the
intervals specified in the periodic
maintenance and lubrication chart.
Clean both filter elements more fre-
quently if you are riding in unusually
wet or dusty areas.
EC000092
cC8Make sure that each filter ele-
ment is properly seated in its
case.
8The engine should never be
operated without the filter ele-
ments installed, otherwise the
piston and/or cylinder may
become excessively worn.
Cleaning the air filter element
1. Place the scooter on the center-
stand.
2. Remove the air filter case cover
by removing the screws.
3. Pull the sponge material out
along with the mesh sheet, clean
it with solvent, and then squeeze
the remaining solvent out.1
2 2
3
4
1. Air filter case cover
2. Screw (×5)
3. Sponge material
4. Mesh sheet
4. Check the sponge material for
damage and replace it if neces-
sary.
5. Allow the sponge material to dry.
6. Apply oil of the recommended
type to the entire surface of the
sponge material, and then
squeeze the excess oil out.
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6-30
PERIODIC MAINTENANCE AND MINOR REPAIR
6 8Refill with the same type of brake
fluid. Mixing fluids may result in a
harmful chemical reaction and
lead to poor braking perfor-
mance.
8Be careful that water does not
enter the brake fluid reservoir
when refilling. Water will signifi-
cantly lower the boiling point of
the fluid and may result in vapor
lock.
8Brake fluid may deteriorate paint-
ed surfaces or plastic parts.
Always clean up spilled fluid
immediately.
8As 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.
EAU03976
Changing the brake fluidBrake fluid, changingHave 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 master
cylinders and calipers as well as the
brake hoses replaced at the intervals
listed below or whenever they are
damaged or leaking.
8Oil seals: Replace every two
years.
8Brake hoses: Replace every four
years.
EAU02962
Checking and lubricating the
cablesCables, checking and lubricatingThe 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.
EW000112
wDamage to the outer sheath may
interfere with proper cable opera-
tion and will cause the inner cable
to rust. Replace a damaged cable
as soon as possible to prevent
unsafe conditions.
Recommended lubricant:
Engine oil
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8-1
EAU01038
SPECIFICATIONS
8
SpecificationsSpecifications
Model YP250
Dimensions
Overall length 2,145 mm
Overall width 770 mm
Overall height 1,350 mm
Seat height 730 mm
Wheelbase 1,535 mm
Ground clearance 120 mm
Minimum turning radius 2,700 mm
Basic weight (with oil and full
fuel tank)170 kg
Engine
Engine type Liquid-cooled 4-stroke, SOHC
Cylinder arrangement Forward inclined single
cylinder
Displacement 249 cm
3
Bore ×Stroke 69.0 ×66.8 mm
Compression ratio 10:1
Starting system Electric starter
Lubrication system Wet sumpEngine oil
Type
Recommended engine oil
classification API Service SE, SF, SG type
or higher
cCBe sure to use motor oils that do not contain anti-friction
modifiers. Passenger car motor oils (often labeled “ENERGY
CONSERVING
II”) contain anti-friction additives which will
cause clutch and/or starter clutch slippage, resulting in
reduced component life and poor engine performance.
Quantity
Periodic oil change 1.2 L
Total amount (dry engine) 1.4 L
–10° 0° 10° 20° 30°
40°
SAE 10W/30
SAE 10W/40
SAE 20W/40
SAE 20W/50
–20°
SAE 15W/40 50°C
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8-2
SPECIFICATIONS
8
Final gear case oil
Type Engine oil SAE 10W-30
(API SE)
Total amount 0.25 L
Radiator capacity
(including all routes)1.4 L
Air filterWet type element
Fuel
Type REGULAR UNLEADED
GASOLINE ONLY
Fuel tank capacity 12 L
Carburetor
Manufacturer TEIKEI
Model × quantity Y28V-1E × 1
Spark plug
Manufacturer/model NGK/DR8EA
Spark plug gap 0.6–0.7 mm
Clutch typeDry, centrifugal automatic
Transmission
Primary reduction system Helical gear
Primary reduction ratio 40/15 (2.666)
Secondary reduction system Helical gear
Secondary reduction ratio 38/15 (2.533)Transmission type V-belt automatic
Operation Centrifugal automatic type
Chassis
Frame type Steel tube underbone
Caster angle 28°
Trail 103 mm
Tires
Front
Type Tubeless
Size 110/90-12 64L
Manufacturer/ IRC/MB67
model MICHELIN/BOPPER
Rear
Type Tubeless
Size 130/70-12 62L
Manufacturer/ IRC/MB67
model MICHELIN/BOPPER
Maximum load* 185 kg
Air pressure (cold tire)
up to 90 kg load*
Front175 kPa (1.75 kgf/cm
2, 1.75 bar)
Rear200 kPa (2.00 kgf/cm2, 2.00 bar)
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8-3
SPECIFICATIONS
8
90 kg load–maximum load*
Front200 kPa (2.00 kgf/cm
2, 2.00 bar)
Rear 225 kPa (2.25 kgf/cm2, 2.25 bar)
* Total weight of rider, passenger, cargo and accessories
Wheels
Front
Type Cast wheel
Size 12 ×MT2.75
Rear
Type Cast wheel
Size 12 ×MT3.50
Brakes
Front
Type Single disc brake
Operation Right hand
Fluid DOT 4
Rear
Type Single disc brake
Operation Left hand
Fluid DOT 4Suspension
Front Telescopic fork
Rear Unit swing
Spring/shock absorbers
Front Coil spring/oil damper
Rear Coil spring/oil damper
Wheel travel
Front 100 mm
Rear 90 mm
Electrical
Ignition system Transistorized coil ignition
(digital)
Charging system
Type A.C. magneto
Standard output 14 V, 19.5 A @ 5,000 r/min
Battery
Type GT7B-4
Voltage, capacity 12 V, 6.5 AH
Headlight bulb typeHalogen bulb
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