2015 YAMAHA WR 450F check engine

PERIODIC MAINTENANCE AND ADJUSTMENT
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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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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)
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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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its gasket, and then the radiator
cap to drain the cooling system.
WARNING! Never attempt to re-
move the radiator cap when the
engine is hot.
[EWA10382]
4. After the coolant is completely
drained, thoroughly flush the cool-
ing system with clean tap water.
5. Install the coolant drain bolt and its new gasket, and then tighten the
bolt to the specified torque.
6. Pour the recommended coolant into the radiator until it is full.
7. Install the radiator cap, start the engine, let it idle for several min-
utes, and then turn it off.
8. Remove the radiator cap to check the coolant level in the radiator. If
necessary, add sufficient coolant
until it reaches the bottom of the
radiator filler neck, and then install
the radiator cap.
9. Start the engine, and then check the vehicle for coolant leakage. If
coolant is leaking, have a Yamaha
dealer check the cooling system.
EAU52933
Cleaning the air filter element
and check hoseThe air filter element should be cleaned
or replaced at the intervals specified in
the periodic maintenance and lubrica-
tion chart. Clean or, if necessary, re-
place the air filter element more
frequently if you are riding in unusually
wet or dusty areas. In addition, the air
filter check hose must be frequently
checked and cleaned if necessary.
To clean the air filter element
1. Open the air filter case cover by loosening the quick fastener screw
and pulling the case cover outward
as shown.
1. Coolant drain bolt
2. GasketTightening torque:Coolant drain bolt:
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
21
Antifreeze/water mixture ratio:1:1
Recommended antifreeze:
High-quality ethylene glycol anti-
freeze containing co rrosion inhibitors
for aluminum engines
Coolant quantity: Radiator capacity (including all
routes):1.04 L (1.10 US qt, 0.92 Imp.qt)
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
Apply the lithium soap base
grease on the matching surface onthe sponge material.
6. Insert the air filter element into the air filter case. NOTICE: Make sure
that the air filter element is prop-
erly seated in the air filter case.
The engine should never be op-
erated without the air filter ele-
ment installed, otherwise the
piston(s) and/or cylinder(s) may
become excessively worn.
[ECA10482]
TIPAlign the projection on the air filter ele-
ment with the hole in the air filter case.
7. Place the holding clip in the origi- nal position.TIPHook the holding clip so that it contactsthe filter guide projections. 8. Close the air filter case cover, and
then tighten the quick fastener
screw.
To clean the air filter check hose 1. Check the hose at the bottom of the air filter case for accumulated
dirt or water.
1. Projection
2. Hole
3. Matching surface
1 23
1. Hole
2. Projection
3. Air filter element
1 2
3
1. Holding clip
2. Projection
1
2
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12 2. If dirt or water is visible, remove
the hose, clean it, and then install
it.
EAU52461
Adjusting the engine idling
speedThe engine idling speed must be
checked and, if necessary, adjusted as
follows.TIPA digital tachometer is needed to makethis adjustment.
1. Position the digital tachometer at the ignition coil, which is located in
the spark plug cap.
2. Check the engine idling speed and, if necessary, adjust it to spec-
ification by turning the starter
knob/idle adjusting screw. To in-
crease the engine idling speed,
turn the screw in direction (a). To
decrease the engine idling speed,
turn the screw in direction (b).
TIPIf the specified idling speed cannot be
obtained as described above, have aYamaha dealer make the adjustment.
1. Air filter check hose
1
1. Starter knob/idle adjusting screwEngine idling speed:1900–2100 r/min
1(a)
(b)
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EAU21385
Checking the throttle grip free
playThe throttle grip free play should mea-
sure 3.0–5.0 mm (0.12–0.20 in) at the
inner edge of the throttle grip. Periodi-
cally check the throttle grip free play
and, if necessary, have a Yamaha
dealer adjust it.
EAU21402
Valve clearanceThe valve clearance changes with use,
resulting in improper air-fuel mixture
and/or engine noise. To prevent this
from occurring, the valve clearance
must be adjusted by a Yamaha dealer
at the intervals specified in the periodic
maintenance and lubrication chart.
EAU52883
TiresTires are the only contact between the
vehicle and the road. Safety in all con-
ditions of riding depends on a relatively
small area of road contact. Therefore, it
is essential to maintain the tires in good
condition at all times and replace them
at the appropriate time with the speci-
fied tires.
Tire air pressure
The tire air pressure should be checked
and, if necessary, adjusted before each
ride.
WARNING
EWA10442
Operation of this vehicle with im-
proper tire pressure may cause se-
vere injury or death from loss of
control.
The tire air pressure must be
checked and adjusted on cold
tires (i.e., when the temperature
of the tires equals the ambient
temperature).

The tire air pressure must be ad-
justed in accordance with the
riding speed and with the total
1. Throttle grip free play
1
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EAU23026
Cleaning and l ubricating the
drive chainThe drive chain must be cleaned and
lubricated at the intervals specified in
the periodic maintenance and lubrica-
tion chart, otherwise it will quickly wear
out, especially when riding in dusty or
wet areas. Service the drive chain as
follows.NOTICE
ECA10584
The drive chain must be lubricated
after washing the motorcycle, ridingin the rain or riding in wet areas.
1. Clean the drive chain with kero- sene and a small soft brush.
NOTICE: To prevent damaging
the O-rings, do not clean the
drive chain with steam cleaners,
high-pressure washers or inap-
propriate solvents.
[ECA11122]
2. Wipe the drive chain dry.
3. Thoroughly lubricate the drive chain with a special O-ring chain
lubricant. NOTICE: Do not use
engine oil or any other lubri-
cants for the drive chain, as they may contain substances that
could damage the O-rings.
[ECA11112]
EAU23098
Checking and lubricating the
cablesThe operation of all control cables and
the condition of the cables should be
checked before each ride, and the ca-
bles and cable ends should be lubricat-
ed if necessary. If a cable is damaged
or does not move smoothly, have a
Yamaha dealer check or replace it.
WARNING! Damage to the outer
housing of cables may result in in-
ternal rusting and cause interfer-
ence with cable movement. Replace
damaged cables as soon as possi-
ble to prevent unsafe condi-
tions.
[EWA10712]
Recommended lubricant:
Yamaha cable lubricant or other suit-
able cable lubricant
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