spark plugs YAMAHA XVS125 2002 Owners Manual

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 ...........................................3-2
Anti-theft alarm (optional) ................................3-3
Handlebar switches .........................................3-3
Clutch lever ......................................................3-5
Shift pedal ........................................................3-5
Brake lever .......................................................3-5
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 .......3-9
Sidestand .......................................................3-10
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 ................................6-7
Engine oil and oil filter element .......................6-9
Cleaning the air filter element .......................6-12
Adjusting the carburetor .................................6-14
Adjusting the engine idling speed ..................6-14
Adjusting the throttle cable free play ..............6-15
Adjusting the valve clearance .......................6-15
123
456
5JX-28199-E2 honbun 10/11/01 2:14 PM Page 5

6-2
PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAU03686
Periodic maintenance and lubrication chart
Periodic maintenance and lubrication chart
NOTE:
8
The annual checks must be performed every year, except if a kilometer-based maintenance is performed instead.
8From 30,000 km, repeat the maintenance intervals starting from 6,000 km.
8Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and
technical skills.NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING (× 1,000 km)
ANNUAL
CHECK
1 6 12 18 24
1
*Fuel line•Check fuel hoses and vacuum hose for cracks or damage.√√√√ √
2 Spark plugs•Check condition.
•Clean and regap.√√
•Replace.√√
3*Valves•Check valve clearance.
•Adjust.√√√√
4 Air filter element•Clean.√√
•Replace.√√
5 Clutch•Check operation.
•Adjust.√√√√√
6*Front brake•Check operation, fluid level and vehicle for fluid leakage.
(See NOTE on page 6-4.)√√√√√ √
•Replace brake pads.Whenever worn to the limit
7*Rear brake•Check operation and adjust brake pedal free play.√√√√√ √
•Replace brake shoes.Whenever worn to the limit
5JX-28199-E2 honbun 10/11/01 2:14 PM Page 32

6-7
PERIODIC MAINTENANCE AND MINOR REPAIR
6 2. Pull the rear of the panel out with
the key inserted in the lock, and
then slide the panel forward to
release it in the front.To install the panel
1. Secure the front of the panel,
and then push the rear of the
panel in with the key inserted in
the lock.
2. Turn the key counterclockwise to
the original position, remove it,
and then close the lock cover.
EAU03329
Checking the spark plugs
Spark plugs, checking
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 maintenance and lubrication
chart. In addition, the condition of the
spark plugs can reveal the condition
of the engine.
To remove a spark plug
1. Remove the spark plug cap.
1
1. Spark plug cap
5JX-28199-E2 honbun 10/11/01 2:14 PM Page 37

6-8
PERIODIC MAINTENANCE AND MINOR REPAIR
62. Remove the spark plug as
shown, with the spark plug
wrench included 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
different color, the engine could be
defective. 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.To install a spark plug
1. Measure the spark plug gap with
a wire thickness gauge and, if
necessary, adjust the gap to
specification.
2. Clean the surface of the spark
plug gasket and its mating sur-
face, and then wipe off any grime
from the spark plug threads.
3. Install the spark plug with the
spark plug wrench, and then
tighten it to the specified torque.
1
a
1. Spark plug wrencha. Spark plug gap
Specified spark plug:
CR7HSA (NGK)
U22FSR-U (DENSO)
Spark plug gap:
0.6–0.7 mm
5JX-28199-E2 honbun 10/11/01 2:14 PM Page 38

6-42
PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAU01297
Troubleshooting chart
EW000125
wKeep away open flames and do not smoke while checking or working on the fuel system.1. Fuel
2. Compression
3. Ignition
4. Battery
Remove the spark
There is compression.
There is no compression.
Check the ignition.Have a Yamaha dealer check the vehicle.
Wet
DryWipe off with a dry cloth and correct the spark
Have a Yamaha dealer check the vehicle.
The engine turns
The engine turnsThe battery is good.
Check the battely lead connections,
Check the fuel level
There is enough fuel.
There is no fuel.
Check the compression.
in the fuel tank.
the electrodes. plugs and check
over quickly.
over slowly. and charge the battery if necessary.Open the throttle halfway and
The engine does not start.Check the battery.operate the electric starter. plug gaps, or replace the spark plugs.
Supply fuel.
The engine does not start. Check the compression.
Operate the electric
starter. Operate the electric starter.
The engine does not start.
Have a Yamaha dealer
check the vehicle.
5JX-28199-E2 honbun 10/11/01 2:14 PM Page 72

7-4
MOTORCYCLE CARE AND STORAGE
7
Storage
Storage
Short-term
Always store your motorcycle in a
cool, dry place and, if necessary, pro-
tect it against dust with a porous
cover.
ECA00014
cC8Storing the motorcycle in a
poorly ventilated room or cov-
ering it with a tarp, while it is
still wet, will allow water and
humidity to seep in and cause
rust.
8To 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
protect 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 elec-
trodes 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 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
wTo prevent damage or injury from
sparking, make sure to ground the
spark plug electrodes while turn-
ing the engine over.6. Lubricate all control cables and
the pivoting points of all levers
and pedals as well as of the
sidestand/centerstand.
5JX-28199-E2 honbun 10/11/01 2:14 PM Page 76