2002 YAMAHA XVS250 spark plugs

EAU00009
TABLE OF CONTENTS
GIVE SAFETY THE RIGHT OF WAY .................1-1
DESCRIPTION ...................................................2-1
Left view ............................................................. 2-1
Right view...........................................................2-2
Controls and instruments ................................... 2-3
INSTRUMENT AND CONTROL FUNCTIONS ....3-1
Main switch/steering lock ..................................3-1
Indicator and warning lights ..............................3-2
Speedometer unit ..............................................3-3
Self-diagnosis device ........................................3-3
Anti-theft alarm (optional) ..................................3-3
Handlebar switches ...........................................3-4
Clutch lever .......................................................3-5
Shift pedal .........................................................3-5
Brake lever ........................................................3-6
Brake pedal .......................................................3-6
Fuel tank cap .....................................................3-6
Fuel ...................................................................3-7
Fuel cock ...........................................................3-8
Starter (choke) lever ..........................................3-9
Helmet holder ....................................................3-9
Adjusting the shock absorber assemblies ....... 3-10
Sidestand ........................................................ 3-11
Ignition circuit cut-off system ........................... 3-11PRE-OPERATION CHECKS ...............................4-1
Pre-operation check list .....................................4-1
OPERATION AND IMPORTANT RIDING
POINTS................................................................5-1
Starting the engine ............................................5-1
Starting a warm engine .....................................5-2
Shifting ..............................................................5-3
Recommended shift points
(for Switzerland only) .....................................5-3
Tips for reducing fuel consumption ...................5-4
Engine break-in .................................................5-4
Parking ..............................................................5-5
PERIODIC MAINTENANCE AND MINOR
REPAIR................................................................6-1
Owner’s tool kit ..................................................6-1
Periodic maintenance and lubrication chart ......6-2
Removing and installing panels ........................6-5
Checking the spark plugs ..................................6-8
Engine oil and oil filter element .......................6-10
Cleaning the air filter element .........................6-12
Adjusting the carburetor ..................................6-15
Adjusting the engine idling speed ...................6-15
Adjusting the throttle cable free play ...............6-16
Adjusting the valve clearance .........................6-16
Tires ................................................................6-16
Spoke wheels ..................................................6-19
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-2
6
EAU03685
Periodic maintenance and lubrication chart
NOTE:_

The annual checks must be performed every year, except if a kilometer-based maintenance is performed instead.


From 50,000 km, repeat the maintenance intervals starting from 10,000 km.


Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and techni-
cal skills.
_CP-03ENO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING (×1,000 km)
ANNUAL
CHECK
1 10203040
1
*Fuel lineCheck fuel hoses and vacuum hose for cracks or damage.√√√√ √
2*Fuel filterCheck condition.√√
3 Spark plugsCheck condition.
Clean and regap.√√
Replace.√√
4*ValvesCheck valve clearance.
Adjust.√√√√
5 Air filter elementClean.√√
Replace.√√
6ClutchCheck operation.
Adjust.√√√√√
7*Front brakeCheck operation, fluid level and vehicle for fluid leakage.
(See NOTE on page 6-4.)√√ √ √ √ √
Replace brake pads. Whenever worn to the limit
8*Rear brakeCheck operation and adjust brake pedal free play.√√√√√ √
Replace brake shoes. Whenever worn to the limit
9*Brake hoseCheck for cracks or damage.√√√√ √
Replace. (See NOTE on page 6-4.) Every 4 years
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-8
6
EAU03329
Checking the spark plugs The spark plugs are important engine
components, which are easy to check.
Since heat and deposits will cause any
spark plug to slowly erode, the spark
plugs should be removed and checked
in accordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plugs can re-
veal the condition of the engine.
To remove a spark plug
1. Remove the spark plug cap.2. Remove the spark plug as shown,
with the spark plug wrench includ-
ed in the owner’s tool kit.To check the spark plugs
1. Check that the porcelain insulator
around the center electrode on
each spark plug is a medium-to-
light tan (the ideal color when the
motorcycle is ridden normally).
2. Check that all spark plugs installed
in the engine have the same color.
NOTE:_ If any spark plug shows a distinctly dif-
ferent color, the engine could be defec-
tive. Do not attempt to diagnose such
problems yourself. Instead, have a
Yamaha dealer check the motorcycle. _3. Check each spark plug for elec-
trode erosion and excessive car-
bon or other deposits, and replace
it if necessary.
1. Spark plug cap
1. Spark plug wrench
Specified spark plug:
CR6HSA (NGK) or
U20FSR-U (DENSO)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-41
6
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Troubleshooting chart
EW000125
WARNING
_ 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 plugs
and check the electrodes.3. Ignition
Wipe off with a dry cloth and correct the
spark plug gaps, or replace the spark plugs.
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.
E_5kr.book Page 41 Friday, December 14, 2001 11:33 AM

MOTORCYCLE CARE AND STORAGE
7-4
7
Storage Short-term
Always store your motorcycle in a cool,
dry place and, if necessary, protect it
against dust with a porous cover.
ECA00014
CAUTION:_

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
several months:
1. Follow all the instructions in the
“Care” section of this chapter.
2. Turn the fuel cock lever to “ON”.
3. Drain the carburetor float cham-
bers by loosening the drain bolts;
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 cylinders, piston rings, etc.
from corrosion.a. Remove the spark plug caps and
spark plugs.
b. Pour a teaspoonful of engine oil
into each spark plug bore.
c. Install the spark plug caps onto the
spark plugs, and then place the
spark plugs on the cylinder head
so that the electrodes are ground-
ed. (This will limit sparking during
the next step.)
d. Turn the engine over several times
with the starter. (This will coat the
cylinder walls with oil.)
e. Remove the spark plug caps from
the spark plugs, and then install
the spark plugs and the spark plug
caps.
EWA00003
WARNING
_ To prevent damage or injury from
sparking, make sure to ground the
spark plug electrodes while turning
the engine over. _
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