engine YAMAHA TTR50 2008 Owner's Guide

PERIODIC MAINTENANCE AND MINOR REPAIR
6-25
6
EAU42020
Replacing the fuse The fuse is located inside the battery
coupler.
If the fuse is blown, replace it as fol-
lows.
1. Turn the key to “OFF” and turn off
all electrical circuits.
2. Disconnect the battery coupler.
3. Remove the blown fuse, and then
install a new fuse of the specified
amperage.
CAUTION:
ECA10640
Do not use a fuse of a higher amper-
age rating than recommended to
avoid causing extensive damage to
the electrical system and possibly afire.
4. Connect the battery coupler.
5. Turn the key to “ON” and turn on
the electrical circuits to check if the
devices operate.
6. If the fuse immediately blows
again, have a Yamaha dealer
check the electrical system.
EAU24350
Supporting the motorcycle Since this model is not equipped with a
centerstand, follow these precautions
when removing the front and rear
wheel or performing other maintenance
requiring the motorcycle to stand up-
right. Check that the motorcycle is in a
stable and level position before starting
any maintenance. A strong wooden
box can be placed under the engine for
added stability.
To service the front wheel
1. Stabilize the rear of the motorcycle
by using a motorcycle stand or, if
an additional motorcycle stand is
not available, by placing a jack un-
der the frame in front of the rear
wheel.
2. Raise the front wheel off the
ground by using a motorcycle
stand.
To service the rear wheel
Raise the rear wheel off the ground by
using a motorcycle stand or, if a motor-
cycle stand is not available, by placing
1. Fuse
2. Spare fuseSpecified fuse:
10.0 A
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-30
6
EAU25901
Troubleshooting chart
WARNING
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.
U1P682E0.book Page 30 Wednesday, May 23, 2007 9:34 AM

MOTORCYCLE CARE AND STORAGE
7-1
7
EAU37833
Matte color caution CAUTION:
ECA15192
Some models are equipped with
matte colored finished parts. Be
sure to consult a Yamaha dealer for
advice on what products to use be-
fore cleaning the vehicle. Using a
brush, harsh chemical products or
cleaning compounds when cleaning
these parts will scratch or damage
their surface. Wax also should not
be applied to any matte colored fin-ished parts.
EAU40462
Care While the open design of a motorcycle
reveals the attractiveness of the tech-
nology, it also makes it more vulnera-
ble. Rust and corrosion can develop
even if high-quality components are
used. A rusty exhaust pipe may go un-
noticed on a car, however, it detracts
from the overall appearance of a motor-
cycle. 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 cleaning
1. 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 in-
stalled.
3. Remove extremely stubborn dirt,
like oil burnt onto the crankcase,
with a degreasing agent and a
brush, but never apply such prod-ucts onto seals, gaskets, sprock-
ets, the drive chain and wheel
axles. Always rinse the dirt and de-
greaser off with water.
Cleaning
CAUTION:
ECA10771


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 af-
fected area any longer than in-
structed. Also, thoroughly rinse
the area off with water, immedi-
ately dry it, and then apply a cor-
rosion protection spray.


Improper cleaning can damage
plastic parts such as cowlings,
panels, windshields, headlight
lenses, meter lenses, etc. Use
only a soft, clean cloth or
sponge with mild detergent and
water to clean plastic.


Do not use any harsh chemical
products on plastic parts. Be
sure to avoid using cloths or
sponges which have been in
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MOTORCYCLE CARE AND STORAGE
7-2
7 contact with strong or abrasive
cleaning products, solvent or
thinner, fuel (gasoline), rust re-
movers or inhibitors, brake flu-
id, antifreeze or electrolyte.


Do not use high-pressure wash-
ers or steam-jet cleaners since
they cause water seepage and
deterioration in the following ar-
eas: seals (of wheel and swing-
arm bearings, fork and brakes),
electric components (couplers,
connectors, instruments,
switches and lights), breather
hoses and vents.


For motorcycles equipped with
a windshield: Do not use strong
cleaners or hard sponges as
they will cause dulling or
scratching. Some cleaning com-
pounds for plastic may leave
scratches on the windshield.
Test the product on a small hid-
den part of the windshield to
make sure that it does not leave
any marks. If the windshield isscratched, use a quality plastic
polishing compound after
washing.
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 or near the seaSince sea salt is extremely corrosive,
carry out the following steps after each
ride in the rain or near the sea.
1. Clean the motorcycle with cold wa-
ter and a mild detergent, after the
engine has cooled down.CAUTION:
ECA10790
Do not use warm water since it in-
creases the corrosive action of thesalt.
2. Apply a corrosion protection spray
on 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 in-
duced discoloring of stainless-
steel exhaust systems can be re-
moved through polishing.)
4. To prevent corrosion, it is recom-
mended to apply a corrosion pro-
tection spray on all metal,
including chrome- and nickel-plat-
ed, surfaces.
5. Use spray oil as a universal clean-
er 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.
WARNING
EWA14500


Make sure that there is no oil or
wax on the tires.
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MOTORCYCLE CARE AND STORAGE
7-3
7


If necessary, wash the tires with
warm water and a mild deter-
gent. Before riding at higher
speeds, test the motorcycle’s
braking performance and cor-nering behavior.
CAUTION:
ECA10800


Apply spray oil and wax spar-
ingly 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 wearaway the paint.
NOTE:Consult a Yamaha dealer for advice onwhat products to use.
EAU26150
Storage Short-term
Always store your motorcycle in a cool,
dry place and, if necessary, protect it
against dust with a porous cover.CAUTION:
ECA10810


Storing the motorcycle in a
poorly ventilated room or cover-
ing it with a tarp, while it is still
wet, will allow water and humid-
ity to seep in and cause rust.


To prevent corrosion, avoid
damp cellars, stables (because
of the presence of ammonia)
and areas where strong chemi-cals are stored.
Long-term
Before storing your motorcycle for sev-
eral months:
1. Follow all the instructions in the
“Care” section of this chapter.
2. For motorcycles equipped with a
fuel cock that has an “OFF” posi-
tion: Turn the fuel cock lever to
“OFF”.3. Drain the carburetor float chamber
by loosening the drain bolt; this will
prevent fuel deposits from building
up. Pour the drained fuel into the
fuel tank.
4. Fill up the fuel tank and add fuel
stabilizer (if available) to prevent
the fuel tank from rusting and the
fuel from deteriorating.
5. Perform the following steps to pro-
tect 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 spark-
ing 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.
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MOTORCYCLE CARE AND STORAGE
7-4
7
WARNING
EWA10950
To prevent damage or injury from
sparking, make sure to ground the
spark plug electrodes while turningthe engine over.
6. Lubricate all control cables and the
pivoting points of all levers and
pedals as well as of the side-
stand/centerstand.
7. Check and, if necessary, correct
the tire air pressure, and then lift
the motorcycle so that both of its
wheels are off the ground. Alterna-
tively, turn the wheels a little every
month in order to prevent the tires
from becoming degraded in one
spot.
8. Cover the muffler outlet with a
plastic bag to prevent moisture
from entering it.
9. 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 ex-
cessively 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
6-23.
NOTE:Make any necessary repairs beforestoring the motorcycle.
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SPECIFICATIONS
8-1
8
Dimensions:Overall length:
1305 mm (51.4 in)
Overall width:
595 mm (23.4 in)
Overall height:
775 mm (30.5 in)
Seat height:
555 mm (21.9 in)
Wheelbase:
925 mm (36.4 in)
Ground clearance:
135 mm (5.31 in)
Minimum turning radius:
1400 mm (55.1 in)Weight:With oil and fuel:
57.0 kg (126 lb)Engine:Engine type:
Air cooled 4-stroke, SOHC
Cylinder arrangement:
Forward-inclined single cylinder
Displacement:
49.0 cm³
Bore × stroke:
36.0 × 48.6 mm (1.42 × 1.91 in)
Compression ratio:
9.50 :1
Starting system:
Electric starter
Lubrication system:
Wet sump
Engine oil:Type:
TT-R50E SAE10W30, SAE10W40,
SAE15W40, SAE20W40 or SAE20W50
TT-R50EX SAE10W30, SAE10W40,
SAE15W40, SAE20W40 or SAE20W50
(AUS)
TT-R50EX YAMALUBE 4, SAE10W30 or
SAE20W40 (CAN)Recommended engine oil grade:
API service SG type or higher, JASO
standard MA
Engine oil quantity:
Periodic oil change:
0.80 L (0.85 US qt) (0.70 Imp.qt)
Air filter:Air filter element:
Wet elementFuel:Recommended fuel:
TT-R50E Regular unleaded gasoline only
(AUT)(BEL)(CHE)(DEU)(DNK)(ESP)(FIN)
(FRA)(GBR)(GRC)(IRL)(NLD)(NOR)(PRT)
(SWE)(ZAF)
TT-R50E Unleaded gasoline only (NZL)
TT-R50EX Regular unleaded gasoline only
(CAN)
TT-R50EX Unleaded gasoline only (AUS)
Fuel tank capacity:
3.1 L (0.82 US gal) (0.68 Imp.gal)
Fuel reserve amount:
0.4 L (0.11 US gal) (0.09 Imp.gal)Carburetor:Manufacturer:
MIKUNI
Type × quantity:
VM11 x 1Spark plug (s):Manufacturer/model:
NGK/CR7HSA
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
-20 -10 0
10 20 30
40
50 ˚C
SAE 10W-30
SAE 15W-40SAE 20W-40SAE 20W-50
SAE 10W-40
10° 30° 50° 70° 90°
110°
0°
130°F
YAMALUBE 4 (10W30)
or SAE 10W30
YAMALUBE 4 (20W40)
or SAE 20W40
–10° 0° 10° 20° 30°
40° –20°
50°C
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INDEXAAccessories and replacement parts ...... 6-14
Air filter element, cleaning....................... 6-8BBattery................................................... 6-23
Brake and shift pedals, checking
and lubricating .................................... 6-20
Brake lever .............................................. 3-3
Brake lever, checking and lubricating ... 6-20
Brake lever free play, adjusting............. 6-15
Brake pedal ............................................. 3-3
Brake pedal free play, adjusting............ 6-16
Brake shoes, checking .......................... 6-16CCables, checking and lubricating .......... 6-19
Carburetor, adjusting ............................ 6-10
Care ........................................................ 7-1
Clutch free play, adjusting..................... 6-14DDrive chain, cleaning and lubricating .... 6-19
Drive chain slack ................................... 6-17EEngine break-in ....................................... 5-3
Engine idling speed............................... 6-11
Engine oil ................................................ 6-6
Engine, starting a warm .......................... 5-2
Engine stop switch .................................. 3-1FFront fork, checking .............................. 6-21
Fuel ......................................................... 3-4
Fuel cock................................................. 3-5
Fuel tank breather hose .......................... 3-5
Fuel tank cap .......................................... 3-3
Fuse, replacing ..................................... 6-25
HHandlebar switches ................................ 3-1IIdentification numbers ............................ 9-1KKey identification number ....................... 9-1LLabels, location of................................... 1-4MMain switch ............................................. 3-1
Maintenance and lubrication, periodic .... 6-3
Maintenance, emission control
system .................................................. 6-2
Maintenance, periodic ............................ 6-1
Matte color, caution ................................ 7-1
Model label ............................................. 9-2PParking ................................................... 5-4
Part locations .......................................... 2-1
Pre-operation check list .......................... 4-2SSafety information................................... 1-1
Seat ........................................................ 3-7
Shifting.................................................... 5-2
Shift pedal............................................... 3-2
Sidestand................................................ 3-7
Sidestand, checking and lubricating ..... 6-21
Spark arrester, cleaning ......................... 6-9
Spark plug, checking .............................. 6-5
Specifications ......................................... 8-1
Speed limiter........................................... 3-2
Starter (choke) lever ............................... 3-6
Starting and warming up a cold
engine .................................................. 5-1Starting circuit cut-off system .................. 3-8
Start switch.............................................. 3-1
Steering, checking................................. 6-22
Storage.................................................... 7-3
Supporting the motorcycle .................... 6-25
Swingarm pivots, lubricating ................. 6-21
TThrottle cable free play, adjusting ......... 6-11
Throttle grip and cable, checking
and lubricating .................................... 6-20
Tires ...................................................... 6-12
Troubleshooting .................................... 6-29
Troubleshooting chart ........................... 6-30VValve clearance..................................... 6-12
Vehicle identification number .................. 9-1WWheel bearings, checking ..................... 6-23
Wheel (front) ......................................... 6-26
Wheel (rear) .......................................... 6-28
Wheels .................................................. 6-14
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