engine YAMAHA WR 450F 2015 Owner's Manual

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PERIODIC MAINTENANCE AND ADJUSTMENT
EAU17245
Periodic inspection, adjustment, and lu-
brication will keep your vehicle in the
safest and most efficient condition pos-
sible. Safety is an obligation of the vehi-
cle owner/operator. The most important
points of vehicle inspection, adjust-
ment, and lubrication are explained on
the following pages.
The intervals given in the periodic
maintenance charts should be simply
considered as a general guide under
normal riding conditions. However, de-
pending on the weather, terrain, geo-
graphical location, and individual use,
the maintenance intervals may need to
be shortened.
WARNING
EWA10322
Failure to properly maintain the ve-
hicle or performing maintenance ac-
tivities incorrectly may increase
your risk of injury or death during
service or while using the vehicle. If
you are not familiar with vehicle ser-
vice, have a Yamaha dealer performservice.
WARNING
EWA15123
Turn off the engine when performing
maintenance unless otherwise
specified.
A running engine has moving
parts that can catch on body
parts or clothing and electrical
parts that can cause shocks or
fires.

Running the engine while ser-
vicing can lead to eye injury,
burns, fire, or carbon monoxide
poisoning – possibly leading to
death. See page 1-2 for more in-
formation about carbon monox-ide.WARNING
EWA15461
Brake discs, calipers, drums, and
linings can become very hot during
use. To avoid possible burns, let
brake components cool beforetouching them.
EAU17303
Emission controls not only function to
ensure cleaner air, but are also vital to
proper engine operation and maximum
performance. In the following periodic
maintenance charts, the services relat-
ed to emissions control are grouped
separately. These services require
specialized data, knowledge, and
equipment. Maintenance, replacement,
or repair of the emission control devic-
es and systems may be performed by
any repair establishment or individual
that is certified (if applicable). Yamaha
dealers are trained and equipped to
perform these particular services.
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EAU52501
TIP
The annual checks must be performed every year, except if a kilometer-based maintenance, or for the UK, a
mileage-based maintenance, is performed instead.

From 7000 km (4200 mi) or 9 months, repeat the maintenance intervals starting from 3000 km (1800 mi) or 3 months.

Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and technicalskills.
EAU52511
Periodic maintenance chart for the emission control systemNO. ITEM CHECKS AND MAINTENANCE JOBS INITIAL
ODOMETER
READINGS ANNUAL
CHECK
1000 km
(600 mi) or 1 month 3000 km
(1800 mi) or 3 months 5000 km
(3000 mi) or 6 months
1 *Fuel line Check fuel hoses for cracks or damage. 
2 *Spark plug Check condition.
Clean and regap.
Replace if necessary. 
3 *Valves Check valve clearance.
Adjust. 
4 *Breather system Check ventilation hose for cracks or damage and drain any
deposits. 
5 *Fuel injection Adjust engine idling speed. 
6 Muffler and exhaust
pipe Check the screw cl
amp(s) for looseness. 
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13 *Chassis fasteners Make sure that all nuts, bol
ts and screws are properly
tightened. 
14 Brake lever pivot
shaft Lubricate with silicone grease.

15 Brake pedal pivot
shaft Lubricate with lithium-soap-based grease.

16 Clutch lever pivot
shaft Lubricate with lithium-soap-based grease.

17 Sidestand Check operation.
Lubricate with lithium-soap-based grease. 
18 *Sidestand switch Check operation. 
19 *Front fork Check operation and for oil leakage. 
20 *Shock absorber
assembly Check operation and shock absorber for oil leakage.

21 *Rear suspension
relay arm and
connecting arm
pivoting points Check operation.

22 Engine oil Change.
Check oil level and vehicle for oil leakage. 
23 Engine oil filter
element

24 *Cooling system Check hoses for cracks of damage.
Replace if necessary.

Check coolant level and vehicle for coolant leakage. 
Change with ethylene glycol anti-freeze coolant. Every 1 year
25 *Front and rear brake
switches Check operation.

NO. ITEM CHECKS AND MAINTENANCE JOBS
INITIAL
ODOMETER
READINGS ANNUAL
CHECK
1000 km
(600 mi) or 1 month 3000 km
(1800 mi) or 3 months 5000 km
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EAU18752
Removing and installing the
panelThe panel shown needs to be removed
to perform some of the maintenance
jobs described in this chapter. Refer to
this section each time the panel needs
to be removed and installed.
EAU52873
Panel A
To remove the panel1. Remove the seat. (See page 3-13.)
2. Remove the bolts. 3. Pull the front part of the panel out-
ward, and then remove the panel
by pulling it off.
To install the panel
1. Place the panel in the original posi- tion, and then install the bolts.
2. Install the seat.
EAU19623
Checking the spark plugThe spark plug is an important engine
component, which should be checked
periodically, preferably by a Yamaha
dealer. Since heat and deposits will
cause any spark plug to slowly erode, it
should be removed and checked in ac-
cordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plug can re-
veal the condition of the engine.
The porcelain insulator around the cen-
ter electrode of the spark plug should
be a medium-to-light tan (the ideal color
when the vehicle is ridden normally). If
the spark plug shows a distinctly differ-
ent color, the engine could be operating
improperly. Do not attempt to diagnose
such problems yourself. Instead, have
a Yamaha dealer check the vehicle.
If the spark plug shows signs of elec-
trode erosion and excessive carbon or
other deposits, it should be replaced.
Before installing a spark plug, the spark
plug gap should be measured with a
1. Panel A
1
1. Bolt
1 1
Specified spark plug:NGK/CR8E
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wire thickness 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.
TIPIf a torque wrench is not available when
installing a spark plug, a good estimate
of the correct torque is 1/4–1/2 turn past finger tight. However, the spark
plug should be tightened to the speci-
fied torque as soon as possible.
EAU52967
Engine oil and oil filter
elementThe engine oil level should be checked
before each ride. In addition, the oil
must be changed and the oil filter ele-
ment replaced at the intervals specified
in the periodic maintenance and lubri-
cation chart.
To check the engine oil level
1. Place the vehicle on a level sur- face and hold it in an upright posi-
tion. A slight tilt to the side can
result in a false reading.
2. Start the engine, warm it up for several minutes, and then turn it
off.
3. Wait a few minutes until the oil set- tles, remove the engine oil tank
cap, wipe the dipstick clean, insert
it back into the oil tank (without
screwing it in), and then remove it
again to check the oil level.
WARNING! Never remove the
engine oil tank cap after
high-speed operation, other-
wise hot engine oil could spout
out and cause damage or injury.
1. Spark plug gapSpark plug gap:0.7–0.8 mm (0.028–0.031 in)
Tightening torque: Spark plug: 13 Nm (1.3 m·kgf, 9.4 ft·lbf)
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12 And do not touch the radiator
pipe after high-speed operation,
otherwise the cooling system is
hot and cause burns. Always let
the engine oil cool down suffi-
ciently before removing the oil
tank cap.
[EWA16141]

NOTICE: Do not
operate the vehicle until you
know that the engine oil level is
sufficient.
[ECA10012]
4. The engine oil should be above the minimum level mark. If the engine
oil level is above the minimum lev-
el mark, continue to the next step.
If the engine oil level is below the
minimum level mark, remove the
engine oil filler cap and add the
recommended oil to bring the en-
gine oil level above the minimum
level mark.
5. Place an oil pan under the engine and then remove the engine oil
check bolt and gasket. 6. The engine oil level should be be-
low the level of the check bolt hole.
If any oil does come out, allow it to
drain.
7. Install the engine oil tank cap and
1. Engine oil tank cap
2. Engine oil filler cap
1
2
1. Engine oil tank cap
2. Dipstick
3. Minimum level mark
312
1. Engine oil check bolt
2. Gasket
1. Engine oil check bolt hole
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engine oil filler cap.
8. Install the engine oil check bolt and gasket, and then tighten the bolt to
the specified torque.
9. Start the engine and warm it up for a few minutes. Then turn the en-
gine off and wait a few minutes to
allow the oil to settle. Use the en-
gine oil tank cap and dipstick to
confirm that the engine oil level is
correct.
To change the engine oil (with or
without oil filter element replace-
ment) 1. Place the vehicle on a level sur- face.
2. Start the engine, warm it up for several minutes, and then turn it
off.
3. Place an oil pan under the engine to collect the used oil.
4. Remove the engine guard by re- moving the bolts. 5. Remove the engine oil tank cap
and the engine oil filler cap.
6. Remove the engine oil drain bolts and their gasket to drain the oil from the oil tank and crankcase.
7. Remove the engine oil filter ele- ment drain bolt and its gasket to
drain the oil from the oil filter ele-
Tightening torque:Engine oil check bolt: 10 Nm (1.0 m·kgf, 7.2 ft·lbf)
1. Bolt
2. Engine guard
1. Engine oil tank cap
2. Engine oil filler cap2
1
1
1
2
1. Engine oil drain bolt (oil tank)
2. Gasket
1. Engine oil drain bolt (crankcase)
2. Gasket
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12 ment.
TIPSkip steps 8–10 if the oil filter elementis not being replaced.
8. Remove the oil filter element cover by removing the bolts. 9. Remove and replace the oil filter
element and O-rings.
10. Install the oil filter element cover by installing the bolts, and then tight-
en the bolts to the specified torque.
TIPMake sure that the O-rings are properlyseated.
11. Install the engine oil drain bolts and their new gasket, and then
tighten the bolts to the specified
torques.
12. Refill with the specified amount of the recommended engine oil, and
then install and tighten the engine
oil tank cap and the oil filler cap.
1. Engine oil filter element drain bolt
2. Gasket
21
1. Oil filter element cover
2. Oil filter element cover bolt
1. Oil filter element cover
2. Oil filter element
3. O-ring
1
2
1 2
3
3
3
Tightening torque: Oil filter element cover bolt:10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Tightening torques: Engine oil drain bolt (oil tank):20 Nm (2.0 m·kgf, 14 ft·lbf)
Engine oil drain bolt (crank case): 20 Nm (2.0 m·kgf, 14 ft·lbf)
Engine oil filter element drain bolt:
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
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TIPBe sure to wipe off spilled oil on any
parts after the engine and exhaust sys-tem have cooled down.NOTICE
ECA11621

In order to prevent clutch slip-
page (since the engine oil also
lubricates the clutch), do not
mix any chemical additives. Do
not use oils with a diesel speci-
fication of “CD” or oils of a high-
er quality than specified. In
addition, do not use oils labeled
“ENERGY CONSERVING II” or
higher.

Make sure that no foreign mate-rial enters the crankcase.
13. Start the engine, and then let it idle for several minutes while checking it for oil leakage. If oil is leaking, im-
mediately turn the engine off and
check for the cause.
14. Turn the engine off and wait a few minutes to allow the oil to settle.
Use the engine oil tank cap and
dipstick to confirm that the engine
oil level is correct.
15. Install the engine guard by install- ing the bolts.
NOTICE
ECA11232
After changing the engine oil, make
sure to check the oil pressure as de-
scribed below.
Loosen the bleed bolt.

Start the engine and keep it
idling until oil flows out. If no oil
comes out after one minute,
turn the engine off immediately
so it will not seize. If this occurs,
have a Yamaha dealer repair the
vehicle.

After checking the oil pressure, tighten the bleed bolt to the
specified torque.
Recommended engine oil:
See page 8-1.
Oil quantity: Without oil filter element replace-
ment:
0.95 L (1.00 US qt, 0.84 Imp.qt)
With oil filter element replacement:
1.00 L (1.06 US qt, 0.88 Imp.qt)
Tightening torque:Engine guard bolt:7 Nm (0.7 m·kgf, 5.1 ft·lbf)
1. Bleed bolt
2. GasketTightening torque:
Bleed bolt:10 Nm (1.0 m·kgf, 7.2 ft·lbf)
21
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EAU20071
CoolantThe coolant level should be checked
before each ride. In addition, the cool-
ant must be changed at the intervals
specified in the periodic maintenance
and lubrication chart.
EAUM1296
To check the coolant level 1. Place the vehicle on a level sur- face and hold it in an upright posi-
tion.TIP
The coolant level must be checked
on a cold engine since the level
varies with engine temperature.

Make sure that the vehicle is posi-
tioned straight up when checking
the coolant level. A slight tilt to theside can result in a false reading.
2. Remove the radiator cap and check the coolant level in the radi-
ator. WARNING! Never attempt
to remove the radiator cap when
the engine is hot.
[EWA10382]
TIPThe coolant should be at the bottom of
the radiator filler neck. The level will
change with variation of engine temper-ature. 3. If the coolant is below the correct
coolant level, add coolant, and
then install the radiator cap.
NOTICE: If coolant is not avail-
able, use distilled water or soft
tap water instead. Do not use
hard water or salt water since it
is harmful to the engine. If water
has been used instead of cool-
ant, replace it with coolant as
soon as possible, otherwise the
cooling system will not be pro-
tected against frost and corro-
sion. If water has been added to
the coolant, have a Yamaha
dealer check the antifreeze con-
tent of the coolant as soon as
possible, otherwise the effec-
tiveness of the coolant will be
reduced.
[ECA10473]
EAUM1316
To change the coolant1. Place the vehicle on a level sur- face and let the engine cool if nec-
essary.
2. Place a container under the engine to collect the used coolant.
3. Remove the coolant drain bolt and
1. Radiator cap
1. Radiator filler neck
2. Correct coolant level
1
2
1
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