2000 YAMAHA XV125S spark plugs

EAU00009
TABLE OF CONTENTS
1
2
3
4
5
6
7
8
9 GIVE SAFETY THE RIGHT OF WAY ..................1-1
DESCRIPTION .....................................................2-1
Left view............................................................2-1
Right view .........................................................2-2
Controls/Instruments .......................................2-3
INSTRUMENT AND CONTROL
FUNCTIONS ........................................................3-1
Main switch ......................................................3-1
Indicator lights..................................................3-1
Speedometer ....................................................3-2
Handlebar switches..........................................3-2
Clutch lever .......................................................3-4
Shift pedal.........................................................3-4
Front brake lever ..............................................3-4
Rear brake pedal ..............................................3-5
Fuel tank cap.....................................................3-5
Fuel ....................................................................3-6
Fuel cock ...........................................................3-7
Starter (choke) “1” .........................................3-8
Steering lock .....................................................3-8
Seat ...................................................................3-9
Helmet holder ...................................................3-9
Rear shock absorber adjustment ..................3-10
Sidestand ........................................................3-10Sidestand/clutch switch operation check .....3-11
PRE-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 ...................................5-3
Shifting..............................................................5-4
Recommended shift point
(for Switzerland only) ......................................5-4
Tips for reducing fuel consumption ...............5-5
Engine break-in ................................................5-5
Parking ..............................................................5-6
PERIODIC MAINTENANCE AND MINOR
REPAIR ................................................................6-1
Tool kit ..............................................................6-1
Periodic maintenance and lubrication............6-3
Panel removal and installation .......................6-6
Panel A ..............................................................6-6
Panel B ..............................................................6-7
Spark plugs .......................................................6-8
Engine oil ..........................................................6-9
Air filter ...........................................................6-12
1
2
3
4
5
6
5AJ-9-E3 (XV125S)<3.1E> 4/5/0 5:01 PM Page 5

PERIODIC MAINTENANCE AND MINOR REPAIR
1
2
3
4
5
6
7
8
9
6-3
EAU00473PERIODIC MAINTENANCE AND LUBRICATION
Every
Every
6,000 km 12,000 km
No. ITEM CHECKS AND MAINTENANCE JOBSINITIAL or or
1,000 km 6 months 12 months
(Whichever (Whichever
comes first) comes first)
1 * Fuel line 9Check fuel hoses and vacuum hose for cracks or damage.
ÖÖ
9Replace if necessary.
2 Spark plugs9Check condition.
ÖÖÖ
9Clean, regap or replace if necessary.
3 * Valves 9Check valve clearance.
ÖÖÖ
9Adjust if necessary.
4 Air filter9Clean or replace if necessary.ÖÖ
9Check electrolyte level and specific gravity.
5 * Battery9Correct or recharge if necessary.ÖÖ
9Make sure that the breather hose is properly routed.
6 Clutch9Check operation.
ÖÖÖ
9Adjust or replace cable.
9Check operation, fluid level and vehicle for fluid leakage.
7 * Front brake (See NOTE on page 6-5.)
ÖÖÖ
9Correct accordingly.
9Replace brake pads if necessary.
8 * Rear brake 9Check operation.
ÖÖÖ
9Adjust brake pedal freeplay and replace brake shoes if necessary.
9 * Wheels 9Check balance, runout, spoke tightness and for damage.
ÖÖ
9Tighten spokes and rebalance, replace if necessary.”
9Check tread depth and for damage.
10 * Tires9Replace if necessary.
ÖÖ
9Check air pressure.
9Correct if necessary.
5AJ-9-E3 (XV125S)<3.1E> 4/5/0 5:01 PM Page 34

PERIODIC MAINTENANCE AND MINOR REPAIR
1
2
3
4
5
6
7
8
9
6-8
1
EAU03053Spark plugsRemoval
1. Remove the spark plug caps.
1. Spark plug cap
1
2. Use the spark plug wrench in
the tool kit to remove the spark
plugs as shown.
1. Spark plug wrench
Inspection
The spark plug is an important engine
component and is easy to inspect.
The condition of the spark plug can
indicate the condition of the engine.
Normally, all spark plugs from the
same engine should have the same
color on the white insulator around
the center electrode. The ideal color
at this point is a medium-to-light tan
color for a motorcycle that is being
ridden normally. If one spark plug
shows a distinctly different color,
there could be something wrong with
the engine.
Do not attempt to diagnose such
problems yourself. Instead, take the
motorcycle to a Yamaha dealer. You
should periodically remove and
inspect the spark plugs because heat
and deposits will cause any spark
plug to slowly break down and erode.
If electrode erosion becomes exces-
sive, or if carbon and other deposits
are excessive, you should replace the
spark plug with the specified plug.
Specified spark plug:
CR6HSA (NGK) or
U20FSR-U (DENSO)
5AJ-9-E3 (XV125S)<3.1E> 4/5/0 5:01 PM Page 39

1
2
3
4
56
7
8
9
6-41
PERIODIC MAINTENANCE AND MINOR REPAIR
EAU01562
Troubleshooting chart
EW000125
wNever check the fuel system while smoking or in the vicinity of an open flame.1. Fuel
2. Compression
3. Ignition
4. Battery
Remove spark
There is compression.
Go to ignition check.
No compression.
Ask a Yamaha dealer to inspect.Wet.
Dry.Wipe clean with dry cloth and correct Open throttle half-way and start the
Ask a Yamaha dealer to inspect.
Engine turns over
Engine turns overBattery good.
Check fluid, recharge,
Check if there is fuel
Enough fuel.
No fuel.
Go to compression check.Supply fuel.
in the fuel tank
electrode. plugs and check
quickly.
slowly. check connections.Engine doesn’t start, go to battery
check.engine. plug gap or replace spark plugs.
Engine doesn’t start, ask aYamaha dealer to inspect.
Engine doesn’t start, go to compression check.
Use the electric
starter. Use the electric starter.
5AJ-9-E3 (XV125S)<3.1E> 4/14/00 12:23 PM Page 72

1
2
3
4
5
6
7
8
9
MOTORCYCLE CARE AND STORAGE
7-4
Storage
Short-term
Always store your motorcycle in a
cool, dry place and, if necessary,
protect it against dust with a
porous cover.
ECA00014
cC
8Storing 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 chem-
icals are stored.
Long-term
Before storing your motorcycle for
several months:
1. Follow all the instructions in
the “Care” section of this
chapter.
2. Drain the carburetor float
chambers by loosening the
drain bolts; this will prevent
fuel deposits from building up.
Pour the drained fuel into the
fuel tank.
3. Only for motorcycles equipped
with a fuel cock which has an
“OFF” position: Turn the fuel
cock to “OFF”.
4. Fill up the fuel tank and add
fuel stabilizer (if available) to
prevent the fuel tank from rust-
ing and the fuel from deterio-
rating.
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 place the
spark plugs 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 walls
with oil.)
e. Remove the spark plug caps
from the spark plugs, install
the spark plugs and then the
spark plug caps.
EWA00003
w
When turning the engine over, be
sure to ground the spark plug elec-
trodes to prevent damage or injury
from sparking.
6. Lubricate all control cables and
the pivoting points of all levers
and pedals as well as of the
sidestand/centerstand.
5AJ-9-E3 (XV125S)<3.1E> 4/5/0 5:01 PM Page 76