spark plugs replace YAMAHA YXZ1000R 2019 Owners Manual

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EBU37180Maintenance chartsEven if the vehicle isn’t driven for the stated mileage or engine hours, the month maintenance
intervals should still be followed. Items marked with an asterisk should be performed by a
Yamaha dealer as they require special tools, data and technical skills.EBU35771Periodic maintenance chart for the emission control system
 For vehicles equipped with an odometer or an ho ur meter, follow the km (mi) or hours mainte-
nance intervals. However, keep in mind that if the vehicle isn’t used for a long period of time,
the month maintenance intervals should still be followed.
 Items marked with an asterisk should be perfor med by a Yamaha dealer as they require special
tools, data and technical skills.NO. ITEM ROUTINE INITIAL
EVERY
Whichev- er comes first month 1 3 6 6 12
km
(mi) 240
(150) 1300
(800) 2500
(1600) 2500
(1600) 5000
(3200)
hours 20 80 160 160 320
1 *Fuel line • Check fuel hose for cracks or damage.
• Replace if necessary.
√√√
2 *Va l v e s • Check valve clearance and adjust if neces-
sary. Every 5000 km (3200 mi).
3 *Spark plugs • Check condition.
• Adjust gap and clean.
• Replace if necessary. √√√√√
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To change the coolant
The coolant must be changed at the intervals
specified in the periodic maintenance chart.
Have a Yamaha dealer change the coolant.
WARNING! Never attempt to remove the
radiator cap when the engine is hot.
[EWB04250]
EBU32400
Axle bootsCheck the axle boots for holes or tears.
If any damage is found, have them replaced
by a Yamaha dealer.
EBU35121Checking the spark plugsThe spark plug is an important engine com-
ponent which should be periodically
checked, preferably by a Yamaha dealer.
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 chart for the emis-
sion control system. In addition, the condition
of the spark plugs can reveal the condition of
the engine.
1. Front axle boot
1
1
1. Rear axle boot
1
1
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The porcelain insulator around the center
electrode of each spark plug should be a me-
dium-to-light tan color (the ideal color when
the vehicle is ridden normally), and all spark
plugs installed in the engine should have a
similar color. If any spark plug shows a dis-
tinctly different color, the engine could be op-
erating improperly. Do not attempt to
diagnose such problems yourself. Instead,
have a Yamaha dealer check the vehicle.
If a spark plug shows signs of electrode ero-
sion and excessive carbon or other deposits,
it should be replaced.
Before installing a spark plug, the spark plug
gap should be measured with a wire thick-
ness gauge and, if necessary, adjusted to
specification.Clean the surface of the spark plug gasket
and its mating surface, and then wipe off any
grime from the spark plug threads.Specified spark plug:
NGK/CR9EB
1. Spark plug gapSpark plug gap:0.7–0.8 mm (0.028–0.031 in)
Tightening torque: Spark plug:13 N·m (1.3 kgf·m, 9.6 lb·ft)
1
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EBU35911Troubleshooting chartsStarting problems or poor engine performanceCheck the fuel level in
the fuel tank.1. Fuel
There is enough fuel.
There is no fuel.
Check the battery.
Supply fuel.
The engine does not start.
Check the battery.
Operate the electric starter.4. Compression
There is compression.
There is no compression.
The engine does not start.
Have a Yamaha dealer check the vehicle.Have a Yamaha dealer check the vehicle.
Remove the spark plugs
and check the electrodes.3. Ignition
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 compression.
Operate the electric starter.2. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.
DryWet
Operate the electric starter.
Check the battery lead connections,
and have a Yamaha dealer charge
the battery if necessary.
The engine does not start.
Check the ignition.
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