spark plugs YAMAHA XVS250 2004 Owners Manual

TABLE OF CONTENTSSAFETY INFORMATION ..................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 ......................................3-10
Ignition circuit cut-off system ........3-11
PRE-OPERATION CHECKS..............4-1
Pre-operation check list ..................4-2OPERATION AND IMPORTANT
RIDING POINTS................................. 5-1
Starting a cold engine .................... 5-1
Starting a warm engine .................. 5-2
Shifting ........................................... 5-2
Tips for reducing fuel
consumption ............................... 5-3
Engine break-in .............................. 5-4
Parking ........................................... 5-4
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 ............... 6-6
Engine oil and oil filter element ...... 6-8
Cleaning the air filter element ...... 6-10
Adjusting the carburetor ............... 6-11
Adjusting the engine idling
speed ........................................ 6-12
Adjusting the throttle cable
free play .................................... 6-12
Adjusting the valve clearance ...... 6-13
Tires ............................................. 6-13
Spoke wheels ............................... 6-15
Adjusting the clutch lever
free play .................................... 6-15
Adjusting the brake lever
free play .................................... 6-16Adjusting the brake pedal
position and free play ............... 6-17
Adjusting the rear brake
light switch ................................ 6-18
Checking the front brake pads
and rear brake shoes ............... 6-19
Checking the brake fluid level ...... 6-19
Changing the brake fluid .............. 6-20
Drive chain slack .......................... 6-21
Lubricating the drive chain ........... 6-22
Checking and lubricating the
cables ....................................... 6-23
Checking and lubricating the
throttle grip and cable ............... 6-23
Checking and lubricating the
brake and shift pedals .............. 6-24
Checking and lubricating the
brake and clutch levers ............ 6-24
Checking and lubricating the
sidestand .................................. 6-24
Checking the front fork ................. 6-25
Checking the steering .................. 6-25
Checking the wheel bearings ....... 6-26
Battery ......................................... 6-26
Replacing the fuses ..................... 6-28
Replacing the headlight bulb ....... 6-28
Replacing the tail/brake
light bulb ................................... 6-30
Replacing a turn signal
light bulb ................................... 6-30
Supporting the motorcycle ........... 6-315KRE2.book Page 1 Monday, June 23, 2003 3:32 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-2
6
EAU17701
Periodic maintenance and lubrication chart NOTE:

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


From 50000 km, repeat the maintenance intervals starting from 10000 km.


Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and technicalskills.
NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING (× 1000 km)
ANNUAL
CHECK
1 10203040
1*Fuel lineCheck fuel and vacuum hoses for cracks or damage.√√√√ √
2 Spark plugsCheck condition.
Clean and regap.√ √
Replace.√ √
3*ValvesCheck valve clearance.
Adjust.√ √ √ √
4 Air filter elementClean.√ √
Replace.√ √
5ClutchCheck operation.
Adjust.√ √ √ √ √
6*Front brakeCheck operation, fluid level and vehicle for fluid leakage.√√√√√ √
Replace brake pads. Whenever worn to the limit
7*Rear brakeCheck operation and adjust brake pedal free play.√ √ √ √ √ √
Replace brake shoes. Whenever worn to the limit
8*Brake hoseCheck for cracks or damage.√√√√ √
Replace. Every 4 years
5KRE2.book Page 2 Monday, June 23, 2003 3:32 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-6
6
EAU19161
Panel B
To remove the panel1. Remove the bolt.
2. Pull the rear of the panel out, and
then slide the panel forward to re-
lease it in the front.To install the panel
1. Secure the front of the panel, and
then push the rear of the panel in.
2. Install the bolt.
EAU19543
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.
1. Bolt
1. Spark plug cap
5KRE2.book Page 6 Monday, June 23, 2003 3:32 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-7
6To 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
vehicle 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 aYamaha dealer check the vehicle.3. Check each spark plug for elec-
trode erosion and excessive car-
bon or other deposits, and replace
it if necessary.
To install a spark plug
1. Measure the spark plug gap with a
wire thickness gauge and, if nec-
essary, adjust the gap to specifica-
tion.2. Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the
spark plug threads.
3. Install the spark plug with the
spark plug wrench, and then tight-
en it to the specified torque.
NOTE:
If a torque wrench is not available when
installing a spark plug, a good estimate
of the correct torque is 1/4–1/2 turn
past finger tight. However, the spark
plug should be tightened to the speci-fied torque as soon as possible.
4. Install the spark plug cap.
1. Spark plug wrench
Specified spark plug:
NGK/CR6HSA
DENSO/U20FSR-U1. Spark plug gapSpark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Tightening torque:
Spark plug:
12.5 Nm (1.25 m·kgf, 9.0 ft·lbf)
5KRE2.book Page 7 Monday, June 23, 2003 3:32 PM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-36
6
EAU25891
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 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.
5KRE2.book Page 36 Monday, June 23, 2003 3:32 PM

MOTORCYCLE CARE AND STORAGE
7-3
7
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.
EAU26211
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. 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
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 walls with oil.)
e. Remove the spark plug caps
from the spark plugs, and then
install the spark plugs and the
spark plug caps.
5KRE2.book Page 3 Monday, June 23, 2003 3:32 PM

INDEX
AAir filter element, cleaning .................... 6-10
Anti-theft alarm (optional) ....................... 3-3BBattery .................................................. 6-26
Brake and clutch levers, checking
and lubricating .................................... 6-24
Brake and shift pedals, checking
and lubricating .................................... 6-24
Brake fluid, changing ............................ 6-20
Brake fluid level, checking .................... 6-19
Brake lever ............................................. 3-6
Brake lever free play, adjusting ............ 6-16
Brake pads and shoes, checking.......... 6-19
Brake pedal ............................................ 3-6
Brake pedal position and free play,
adjusting ............................................. 6-17CCables, checking and lubricating .......... 6-23
Carburetor, adjusting ............................ 6-11
Care ........................................................ 7-1
Clutch lever............................................. 3-5
Clutch lever free play, adjusting ........... 6-15DDimmer switch ........................................ 3-4
Drive chain, lubricating ......................... 6-22
Drive chain slack .................................. 6-21EEngine break-in ...................................... 5-4
Engine idling speed .............................. 6-12
Engine oil and oil filter element............... 6-8
Engine, starting a warm .......................... 5-2
Engine stop switch.................................. 3-4
Engine trouble warning light ................... 3-2
FFront fork, checking...............................6-25
Fuel ......................................................... 3-7
Fuel cock ................................................. 3-8
Fuel consumption, tips for reducing ........ 5-3
Fuel tank cap........................................... 3-6
Fuses, replacing .................................... 6-28HHandlebar switches ................................. 3-4
Headlight bulb, replacing....................... 6-28
Helmet holder .......................................... 3-9
High beam indicator light......................... 3-2
Horn switch ............................................. 3-4IIdentification numbers ............................. 9-1
Ignition circuit cut-off system ................. 3-11
Indicator and warning lights .................... 3-2KKey identification number ........................ 9-1LLight switch ............................................. 3-4MMain switch/steering lock ........................ 3-1
Model label .............................................. 9-2NNeutral indicator light .............................. 3-2PPanels, removing and installing .............. 6-5
Parking ....................................................5-4
Part locations .......................................... 2-1
Pass switch ............................................. 3-4
Periodic maintenance and
lubrication chart.....................................6-2
Pre-operation check list........................... 4-2
RRear brake light switch, adjusting ......... 6-18SSafety information ................................... 1-1
Self-diagnosis device .............................. 3-3
Shifting .................................................... 5-2
Shift pedal ............................................... 3-5
Shock absorber assemblies,
adjusting ............................................. 3-10
Sidestand .............................................. 3-10
Sidestand, checking and lubricating ..... 6-24
Spark plugs, checking............................. 6-6
Specifications.......................................... 8-1
Speedometer unit ................................... 3-3
Starter (choke) lever ............................... 3-9
Starting a cold engine ............................. 5-1
Start switch ............................................. 3-4
Steering, checking ................................ 6-25
Storage ................................................... 7-3
Supporting the motorcycle .................... 6-31TTail/brake light bulb, replacing .............. 6-30
Throttle cable free play, adjusting ......... 6-12
Throttle grip and cable, checking
and lubricating .................................... 6-23
Tires ...................................................... 6-13
Tool kit .................................................... 6-1
Troubleshooting .................................... 6-35
Troubleshooting chart ........................... 6-36
Turn signal indicator light ........................ 3-2
Turn signal light bulb, replacing ............ 6-30
Turn signal switch ................................... 3-4VValve clearance, adjusting .................... 6-13
5KRE2.book Page 1 Monday, June 23, 2003 3:32 PM