spark plugs replace YAMAHA XVS125 2001 Owners Manual

PERIODIC MAINTENANCE AND MINOR REPAIR
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Periodic maintenance and lubrication chart
NOTE:
8The 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.ITEMCHECK OR MAINTENANCE JOBODOMETER READING (´1,000 km)
ANNUAL
CHECK
16121824
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*Fuel line¥Check fuel hoses and vacuum hose for cracks or damage.ÖÖÖÖÖ
2Spark plugs¥Check condition.
¥Clean and regap.ÖÖ
¥Replace.ÖÖ
3*Valves¥Check valve clearance.
¥Adjust.ÖÖÖÖ
4Air filter element¥Clean.ÖÖ
¥Replace.ÖÖ
5Clutch¥Check operation.
¥Adjust.ÖÖÖÖÖ
6*Front brake¥Check operation, fluid level and vehicle for fluid leakage.
(See NOTE on page 6-4.)ÖÖÖÖÖÖ
¥Replace brake pads.Whenever worn to the limit
7*Rear brake¥Check operation and adjust brake pedal freeplay.ÖÖÖÖÖÖ
¥Replace brake shoes.Whenever worn to the limit
8*Brake hose¥Check for cracks or damage.ÖÖÖÖÖ
¥Replace. (See NOTE on page 6-4.)Every 4 years
9*Wheels¥Check runout, spoke tightness and for damage.
¥Tighten spokes if necessary.ÖÖÖÖ
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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.
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2.Remove the spark plug as
shown, with the spark plug
wrench included in the ownerÕs
tool kit.1.Spark plug wrench
Specified spark plug:
CR7HSA (NGK) or
U22FSR-U (DENSO)
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.
a
a.Spark plug gap
Spark plug gap:
0.6Ð0.7 mm
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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.
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