2000 YAMAHA XJ600N spark plugs

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6-2
PERIODIC MAINTENANCE AND MINOR REPAIR
/Net/layout8/layout_G2/work/Imai_work/OM-PS/AA9156_XJ600SN-E6/English/E-6.frame
EAU00473
PERIODIC MAINTENANCE AND LUBRICATION
NO. ITEM CHECKS AND MAINTENANCE JOBSINITIAL
(1,000 km)EVERY
6,000 km
or
6 months
(whichever
comes first)12,000 km
or
12 months
(whichever
comes first)
1
*Fuel line ¥ Check fuel hoses and vacuum hose for cracks or damage.
¥ Replace if necessary.ÖÖ
2
*Fuel filter¥ Check condition.
¥ Replace if necessary.Ö
3 Spark plugs¥ Check condition.
¥ Clean, regap or replace if necessary.ÖÖÖ
4
*Valves¥ Check valve clearance.
¥ Adjust if necessary.Every 24,000 km or 24 months
(whichever comes first)
5 Air filter¥ Clean or replace if necessary.ÖÖ
6Clutch¥ Check operation.
¥ Adjust or replace cable.ÖÖÖ
7
*Front brake¥ Check operation, fluid level and vehicle for fluid leakage. (See NOTE
on page 6-4.)
¥ Correct accordingly.
¥ Replace brake pads if necessary.ÖÖÖ
8
*Rear brake¥ Check operation, fluid level and vehicle for fluid leakage. (See NOTE
on page 6-4.)
¥ Correct accordingly.
¥ Replace brake pads if necessary.ÖÖÖ
9
*Wheels¥ Check balance, runout and for damage.
¥ Rebalance or replace if necessary.ÖÖ
10
*Tires¥ Check tread depth and for damage.
¥ Replace if necessary.
¥ Check air pressure.
¥ Correct if necessary.ÖÖ

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PERIODIC MAINTENANCE AND MINOR REPAIR
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To install
1. Place in the original position and
install the screws.
2. Install the seat.
a. Spark plug gap
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Spark plug inspection
The spark plug is an important engine
component and should be inspected
periodically, preferably by a Yamaha
dealer. The condition of the spark plug
can indicate the condition of the en-
gine.
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 normal-
ly. If one spark plug shows a distinctly
different color, there could be some-
thing wrong with the engine.Do not attempt to diagnose such prob-
lems yourself. Instead, take the motor-
cycle to a Yamaha dealer. The spark
plugs should be periodically removed
and inspected because heat and de-
posits will cause any spark plug to
slowly break down and erode. If elec-
trode erosion becomes excessive, or if
carbon and other deposits are exces-
sive, the spark plug should be replaced
with the specified plug.
Before installing any spark plug, mea-
sure the electrode gap with a wire
thickness gauge and adjust it to speci-
fication.Specified spark plug:
CR8E (NGK) or
U24ESR-N(DENSO)
Spark plug gap:
0.7 ~ 0.8 mm

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6-35
PERIODIC MAINTENANCE AND MINOR REPAIR
/Net/layout8/layout_G2/work/Imai_work/OM-PS/AA9156_XJ600SN-E6/English/E-6.frame
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Troubleshooting chart
EW000125
Never check the fuel system while smoking or in the vicinity of an open flame.
Check if there is fuel
in the fuel tank.
1. FuelEnough fuel.
No fuel.Go to compression check.
Supply fuel.
Use the electric starter.
2. CompressionThere is compression.
No compression.Go to ignition check.
Ask a Yamaha dealer to
inspect.
Remove spark
plugs and
check electrodes.
3. IgnitionWet.
Dry.Wipe clean with dry cloth and correct
spark gap or replace spark plugs.
Ask a Yamaha dealer to inspect.
Engine doesnÕt start, go to battery
check.
Open throttle half-way and start
the engine.
Use the electric starter.
4. BatteryEngine turns over
quickly.
Engine turns over
slowly.Battery good.
Check connections or
recharge.
Engine doesnÕt start, ask a Yamaha
dealer to inspect.
Engine doesnÕt start, go to compression check.

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7-4
MOTORCYCLE CARE AND STORAGE
/Net/layout8/layout_G2/work/Imai_work/OM-PS/AA9156_XJ600SN-E6/English/E-7.frame
ECA00013
CAUTION:
lApply spray oil and wax spar-
ingly and wipe off any excess.
lNever apply oil or wax on rub-
ber and plastic parts, but treat
them with a suitable care prod-
uct.
lAvoid using abrasive polishing
compounds as they wear away
the paint.
NOTE:
Consult a Yamaha dealer for advice on
what products to use.
Storage
Short-term
Always store your motorcycle in a cool,
dry place and, if necessary, protect it
against dust with a porous cover.
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CAUTION:
lStoring the motorcycle in a
poorly ventilated room or cov-
ering it with a tarp while it is still
wet will allow water and humidi-
ty to seep in and cause rust.
lTo 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
ÒCareÓ section of this chapter.
2. 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.
3. Only for motorcycles equipped
with a fuel cock which has an
ÒOFFÓ position: Turn the fuel cock
to ÒOFFÓ.
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.

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MOTORCYCLE CARE AND STORAGE
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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
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 side-
stand/centerstand.7. Check and, if necessary, correct
the tire air pressure, then raise the
motorcycle so that both of its
wheels are off the ground. Alterna-
tively, turn the wheels a little every
month in order to prevent the tires
from becoming degraded in one
spot.
8. Cover up the muffler outlets with
plastic bags to prevent moisture
from entering.
9. Remove the battery and fully
charge it. Store it in a cool, dry
place and recharge it once a
month. Do not store the battery in
an excessively cold or warm place
(less than 0ûC or more than 30ûC).
For more information, see ÒBattery
storageÓ in the chapter ÒPERIOD-
IC MAINTENANCE AND MINOR
REPAIRSÓ.
NOTE:
Make any necessary repairs before
storing the motorcycle.