spark plugs replace YAMAHA XV535 2001 Owners Manual

PERIODIC MAINTENANCE AND MINOR REPAIR
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Periodic maintenance and lubrication chart
NOTE:_ l
The annual checks must be performed every year, except if a kilometer-based maintenance is performed instead.
l
From 50,000 km, repeat the maintenance intervals starting from 10,000 km.
l
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 line• Check fuel hoses and vacuum hose for cracks or damage.ÖÖÖÖ Ö
2*Fuel filter• Check condition.ÖÖ
3 Spark plugs• Check condition.
• Clean and regap.ÖÖ
• Replace.ÖÖ
4*Valves• Check valve clearance.
•Adjust.ÖÖÖÖ
5 Air filter element•Clean.ÖÖ
• Replace.ÖÖ
6*Battery• Check electrolyte level and specific gravity.
• Make sure that the breather hose is properly routed.ÖÖÖÖ Ö
7Clutch• Check operation.
•Adjust.ÖÖÖÖÖ
8*Front brake• Check operation, fluid level and vehicle for fluid leakage.
(See NOTE on page 6-4.)ÖÖÖÖÖ Ö
• Replace brake pads. Whenever worn to the limit
9*Rear brake• Check operation and adjust brake pedal freeplay.ÖÖÖÖÖ Ö
• Replace brake shoes. Whenever worn to the limit
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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 appropriate spark
plug cover (rear right or front left)
by removing the screws.
2. Remove the spark plug cap.3. 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 cover
2. Screw (´ 2)
1. Spark plug wrench
Specified spark plug:
BPR6ES (NGK) or
W20EPR-U (DENSO)
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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.
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
Wet
Dry
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.
Check the battery.Open throttle halfway and operate
the electric starter.
Operate the electric starter.4. Battery
The engine turns over
quickly.
The engine turns over
slowly.The battery is good.
Check the electrolyte and battery
lead connections, and charge the
battery if necessary.The engine does not start.
Have a Yamaha dealer
check the vehicle.
The engine does not start.
Check the compressoin.
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