2007 YAMAHA YBR250 Owners Manual

6-32
6
PERIODIC MAINTENANCE AND MINOR REPAIR
EAU25901
Troubleshooting chart
EWA10840
Keep away open flames and do not smoke while checking or working on the \
fuel system.
Check the fuel level in
the fuel tank.1. Fuel
There 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. Compression
There 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. Ignition
Wipe 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. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the battery lead connections,
and charge the battery if necessary.
DryWet
Open the throttle halfway and operate
the electric starter.
cap 6.pmd 24/1/2007, 14:38
32

7-1MOTORCYCLE CARE AND STORAGE
7
EAU26001
CareWhile the open design of a motorcycle
reveals the attractiveness of the
technology, it also makes it more
vulnerable. Rust and corrosion can
develop even if high-quality components
are used. A rusty exhaust pipe may go
unnoticed on a car, however, it detracts
from the overall appearance of a
motorcycle. Frequent and proper care
does not only comply with the terms of
the warranty, but it will also keep your
motorcycle looking good, extend its life
and optimize its performance.
Before cleaning1. Cover the muffler outlet with a plastic bag after the engine has
cooled down.
2. Make sure that all caps and covers as well as all electrical couplers
and connectors, including the spark
plug cap, are tightly installed.
3. Remove extremely stubborn dirt, like oil burnt onto the crankcase,
with a degreasing agent and a
brush, but never apply such
products onto seals, gaskets, sprockets, the drive chain and
wheel axles. Always rinse the dirt
and degreaser off with water.
Cleaning
ECA10770
l
l l
l
l
Avoid using strong acidic wheel
cleaners, especially on spoked
wheels. If such products are
used on hard-to-remove dirt, do
not leave the cleaner on the
affected area any longer than
instructed. Also, thoroughly
rinse the area off with water,
immediately dry it, and then
apply a corrosion protection
spray.
l
l l
l
l
Improper cleaning can damage
windshields, cowlings, panels
and other plastic parts. Use only
a soft, clean cloth or sponge with
mild detergent and water to
clean plastic.
l
l l
l
l
Do not use any harsh chemical
products on plastic parts. Be
sure to avoid using cloths or
sponges which have been in
contact with strong or abrasive
cleaning products, solvent or thinner, fuel (gasoline), rust
removers or inhibitors, brake
fluid, antifreeze or electrolyte.
l
l l
l
l
Do not use high-pressure
washers or steam-jet cleaners
since they cause water seepage
and deterioration in the
following areas: seals (of wheel
and swingarm bearings, fork
and brakes), electric
components (couplers,
connectors, instruments,
switches and lights), breather
hoses and vents.
l
l l
l
l
For motorcycles equipped with
a windshield: Do not use strong
cleaners or hard sponges as
they will cause dulling or
scratching. Some cleaning
compounds for plastic may
leave scratches on the
windshield. Test the product on
a small hidden part of the
windshield to make sure that it
does not leave any marks. If the
windshield is scratched, use a
quality plastic polishing
compound after washing.
cap 7.pmd 24/1/2007, 14:38
1

7-2
MOTORCYCLE CARE AND STORAGE
7
After normal use
Remove dirt with warm water, a mild
detergent, and a soft, clean sponge, and
then rinse thoroughly with clean water.
Use a toothbrush or bottlebrush for hard-
to-reach areas. Stubborn dirt and insects
will come off more easily if the area is
covered with a wet cloth for a few
minutes before cleaning.After riding in the rain, near the sea oron salt-sprayed roads
Since sea salt or salt sprayed on roads
during winter are extremely corrosive in
combination with water, carry out the
following steps after each ride in the rain,
near the sea or on salt-sprayed roads.Salt sprayed on roads in the winter may
remain well into spring.1. Clean the motorcycle with coldwater and a mild detergent, after
the engine has cooled down.
ECA10790
Do not use warm water since it
increases the corrosive action of the
salt.2. Apply a corrosion protection sprayon all metal, including chrome- and
nickel-plated, surfaces to prevent
corrosion.
After cleaning 1. Dry the motorcycle with a chamois or an absorbing cloth.
2. Immediately dry the drive chain and lubricate it to prevent it from
rusting.
3. 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.)
4. To prevent corrosion, it is recommended to apply a corrosion
protection spray on all metal,
including chrome- and nickel-
plated, surfaces. 5. Use spray oil as a universal cleaner
to remove any remaining dirt.
6. Touch up minor paint damage caused by stones, etc.
7. Wax all painted surfaces.
8. Let the motorcycle dry completely before storing or covering it.
EWA11130
l
l l
l
l
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 riding at
higher speeds, test the
motorcycle’s braking
performance and cornering
behavior.
ECA10800
l
l l
l
l
Apply spray oil and wax
sparingly and make sure to wipe
off any excess.
l
l l
l
l
Never apply oil or wax to any
cap 7.pmd 24/1/2007, 14:38
2

7-3MOTORCYCLE CARE AND STORAGE
7
rubber and plastic parts, but treat
them with a suitable care
product.
l
l l
l
l
Avoid using abrasive polishing
compounds as they will wear
away the paint.
Consult a Yamaha dealer for advice on
what products to use.
EAUM1900
StorageShort-term
Always store your motorcycle in a cool,
dry place and, if necessary, protect it
against dust with a porous cover.
ECA10810
l
l l
l
l
Storing the motorcycle in a
poorly ventilated room or
covering it with a tarp, while it
is still wet, will allow water and
humidity to seep in and cause
rust.
l
l l
l
l
To prevent corrosion, avoid
damp cellars, stables (because
of the presence of ammonia) and
areas where strong chemicals
are stored.
Long-term
Before storing your motorcycle for
several months:
1. Follow all the instructions in the “Care” section of this chapter.
2. Fill up the fuel tank and add fuel stabilizer (if available) to prevent
the fuel tank from rusting and the
fuel from deteriorating. 3. Perform the following steps to
protect the cylinder, piston rings,
etc. from corrosion.
a. Remove the spark plug cap and spark plug.
b. Pour a teaspoonful of engine oil into the spark plug bore.
c. Install the spark plug cap onto the spark plug, and then place the
spark plug on the cylinder head so
that the electrodes are grounded.
(This will limit sparking during the
next step.)
d. Turn the engine over several times with the starter. (This will coat the
cylinder wall with oil.)
e. Remove the spark plug cap from the spark plug, and then install the
spark plug and the spark plug cap.
EWA10950
To prevent damage or injury from
sparking, make sure to ground the
spark plug electrodes while turning
the engine over.4. Lubricate all control cables and thepivoting points of all levers and
cap 7.pmd 24/1/2007, 14:38
3

7-4
MOTORCYCLE CARE AND STORAGE
7pedals as well as of the sidestand/
centerstand.
5. Check and, if necessary, correct the tire air pressure, and then lift
the motorcycle so that both of its
wheels are off the ground.
Alternatively, turn the wheels a little
every month in order to prevent the
tires from becoming degraded in
one spot.
6. Cover the muffler outlets with plastic bags to prevent moisture
from entering them.
7. Remove the battery and fully charge it. Store it in a cool, dry
place and charge it once a month.
Do not store the battery in an
excessively cold or warm place
[less than 0 °C (30 °F) or more than
30 °C (90 °F)]. For more information
on storing the battery, see page
6-25~6-26.
Make any necessary repairs before
storing the motorcycle.
cap 7.pmd 24/1/2007, 14:38
4

8-1
SPECIFICATIONS
8
Dimensions:Overall length:2025 mm (79.7 in)
Overall width: 745 mm (29.3 in)
Overall height:
1065 mm (41.9 in)
Seat height:
805 mm (31.7 in)
Wheelbase: 1360 mm (53.5 in)
Ground clearance:
190 mm (7.5 in)
Minimum turning radius:
2395 mm (94.3 in)Weight:With oil and fuel:154.0 kg (339 lb)Engine:Engine type:Air cooled 4-stroke, SOHC
Cylinder arrangement: Forward-inclined single cylinder
Displacement:
249.0 cm
3 (15.2 cu.in)
Bore x stroke:
74.0 x 58.0 mm (2.91 x 2.28 in)
Compression ratio: 9.80:1
Starting system:
Electric starter
Lubrication system:
Wet sump
Engine oil:Type:SAE20W40 or SAE20W50Recommended engine oil grade: API service SF, SG type or higher
Engine oil quantity:
Without oil filter element replacement 1.35 L (1.43 US qt) (1.19 imp. qt)
With oil filter element replacement
1.45 L (1.53 US qt) (1.28 imp. qt)Air filter:Air filter element:Wet elementFuel:Recommended fuel:Regular unleaded gasoline only
Fuel tank capacity:
19.2 L (5.07 US gal) (4.22 imp. gal)
Fuel reserve amount:
4.5 L (1.19 US gal) (1.00 imp. gal)
Fuel injection:Manufacturer:AISAN
Model/quantity: 1100-87F70/1Spark plug:Manufacturer/model:NGK/DR8EA
Spark plug gap:
0.6-0.7 mm (0.024 - 0.028 in)Clutch:Clutch type:Wet, multiple-discTransmission:Primary reduction system:Spur gear
Primary reduction ratio:
74/24 (3.083)
Secondary reduction system: Chain drive
Secondary reduction ratio:
44/15 (2.933)
Transmission type:
Constant mesh 5-speed
Operation: Left foot operation
Gear ratio:
1st:
36/14 (2.571)
2nd:
32/19 (1.684)
3rd:
cap 8.pmd 24/1/2007, 14:38
1

8-2
SPECIFICATIONS
8
28/22 (1.273)
4th:
26/25 (1.040)
5th:
23/27 (0.852)
Chassis:Frame type:Double cradle
Caster angle: 26.50 º
Trail:
104.5 mm (4.11 in)Front tire:Type:Tubeless
Size:
100/80-17M/C (52S)
Manufacturer/model: PIRELLI/SPORT DEMONRear tire:Type:Tubeless
Size:
130/70-17M/C (62S)
Manufacturer/model:
PIRELLI/SPORT DEMONLoading:Maximum load:167 kg (368 b)
(Total weight of rider, passenger, cargo
and accessories)
Tire air pressure (measured on cold
tires):Loading condition:0-90 kg (0-198 lb)
Front:
225 kPa (33 psi) (2.25 kgf/cm
2)
Rear: 250 kPa (36 psi) (2.50 kgf/cm2)
Loading condition:
90-167 kg (198-368 lb)
Front:
225 kPa (33 psi) (2.25 kgf/cm2)
Rear: 250 kPa (36 psi) (2.50 kgf/cm2)
Front wheel:Wheel type:Cast wheel
Rim size:
17M/C x MT2.15Rear wheel:Wheel type:Cast wheel
Rim size:
17M/C x MT3.00Front brake:Type:Single disc brake
Operation: Right hand operation
Recommended fluid:
DOT 3 or 4
Rear brake:Type: Leading, trailing drum brake
Operation: Right foot operation
Recommended fluid:
DOT 3 or 4Front suspension:Type:Telescopic fork
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel: 120.0 mm (4.72 in)Rear suspension:Type:Swingarm (link suspension)
Spring/shock absorber type:
Coil spring/oil damper
Wheel travel:
120.0 mm (4.72 in)Electrical system:Ignition system: Transistorized coil ignition (digital)
Charging system: AC magnetoBattery:Model: YTX77L-BS
Voltage, capacity:
12 V, 6.0 Ah
cap 8.pmd 24/1/2007, 14:38
2

8-3
SPECIFICATIONS
8
Headlight:Bulb type:Halogen bulbBulb voltage, wattage x quantityHeadlight: 12 V, 35 W/35.0 W x 1
Tail brake light: 12 V, 5.0 W/21.0 W x 1
Front turn signal light:
12 V, 10.0 W x 2
Rear turn signal light:
12 V, 10.0 W x 2
Position light: 12 V, 5.0 W
Meter lighting:
14 V, 2.0 W x 2
Neutral indicator light:
14 V, 1.4 W x 1
Turn signal indicator light: 14 V, 1.4 W x 2
High beam indicator light:
14 V, 1.4 W x 1
Engine trouble warning light:
LEDFuses:Main fuse:20.0 A
Headlight fuse: 10.0 A
Signaling system fuse:
10.0 A
Ignition and fuel injection fuse:
10.0 A Backup fuse:
10.0 A
Spare fuses:
10.0 A and 20.0 A
cap 8.pmd 24/1/2007, 14:38
3