2007 YAMAHA WR 450F clock

1 - 14
GEN
INFO
MULTI-FUNCTION DISPLAY
WARNING
Be sure to stop the machine before making
any setting changes to the multi-function
display.
The multi-function display is equipped with the
following:
BASIC MODE:
Speedometer
Clock
Two tripmeters (which shows the distance
that has been traveled since it was last set to
zero)
RACE MODE:
Timer (which shows the time that has been
accumulated since the start of timer mea-
surement)
Tripmeter (which shows the accumulated
travel distance in timer measurement)
Change tripmeter digits (capable of change
to any given ones)
DESCRIPTION
Operation buttons:
1Select button “SLCT 1”
2Select button “SLCT 2”
3Reset button “RST”
Screen display:
4Tripmeter indicator
5Tripmeter indicator
6Timer indicator
7Clock/Timer
8Speedometer
9Odometer/Tripmeter
NOTE:
The operation buttons can be pushed in the
following two manners:
Short push: Push the button. ( )
Long push: Push the button for 2 seconds or
more. ( )
MULTI-FUNCTION DISPLAY

GEN
INFO
1 - 20
MULTI-FUNCTION DISPLAY
FUNCTION DIAGRAM
NOTE:
The following diagram illustrates the multi-function display regarding the direction and operation
condition involved in each of its functions.
A short push on the button changes the opera-
tion in the arrowed direction.
A short push on the button changes the opera-
tion in both arrowed directions.
A long push on the button changes the opera-
tion in the arrowed direction.
A long push on the button changes the opera-
tion in both arrowed directions.Meter function
Function that can be performed whether the
time is or is not in operation.
Extent to which the meter can operate
2Clock
3Tripmeter4Speedometer
(for U.K.)
ODO
→ TRIP A
→ TRIP B
→ ODOMPH
→ km/h
→ MPH
6Putting measurement on
standby
7Manual start8Auto start
9Measurement starts as the
machine moves
0Timer in operation
AReset
TRIP ABCorrect
TRIP ACTimer not in
operation
BCorrect
TRIP ADReset
TRIP A &
timer
1BASIC MODE
5RACE MODE

SPEC
2 - 6 Valve spring:
Free length IN 39.46 mm (1.55 in) 38.46 mm
(1.51 in)
EX 37.61 mm (1.48 in) 36.61 mm
(1.44 in)
Set length (valve closed) IN 27.87 mm (1.10 in) ----
EX 28.38 mm (1.12 in) ----
Compressed force
(installed) IN 130.2 ~ 149.8 N at 27.87 mm
(13.28 ~ 15.28 kg at 27.87 mm,
29.27 ~ 33.68 lb at 1.10 in)----
EX 123.1 ~ 141.7 N at 28.38 mm
(12.55~ 14.45 kg at 28.38 mm,
27.67 ~ 31.85 lb at 1.12 in)----
Tilt limit IN ----
2.5°/ 1.7 mm
(2.5°/0.067 in)
EX ----2.5°/1.6 mm
(2.5°/0.063 in)
Direction of winding (top view) IN Clockwise ----
EX Clockwise ----
Piston:
Piston to cylinder clearance 0.040 ~ 0.065 mm
(0.0016 ~ 0.0026 in)0.1 mm
(0.004 in)
Piston size “D”94.945 ~ 94.960 mm
(3.738 ~ 3.739 in)----
Measuring point “H”8 mm (0.315 in) ----
Piston off-set 1 mm (0.0394 in) ----
Piston pin bore inside diameter 18.004 ~ 18.015 mm
(0.7088 ~ 0.7093 in)18.045 mm
(0.7104 in)
Piston pin outside diameter 17.991 ~ 18.000 mm
(0.7083 ~ 0.7087 in)17.971 mm
(0.7075 in) Item Standard Limit
*
H
D
MAINTENANCE SPECIFICATIONS

3 - 5
INSP
ADJ
EC350000
ENGINE
COOLANT LEVEL INSPECTION
WARNING
Do not remove the radiator cap
1, drain
bolt and hoses when the engine and radia-
tor are hot. Scalding hot fluid and steam
may be blown out under pressure, which
could cause serious injury.
When the engine has cooled, place a thick
towel over the radiator cap, slowly rotate
the cap counterclockwise to the detent.
This procedure allows any residual pres-
sure to escape. When the hissing sound
has stopped, press down on the cap while
turning counterclockwise and remove it.
CAUTION:
Hard water or salt water is harmful to the
engine parts. You may use distilled water, if
you can’t get soft water.
1. Place the machine on a level place, and
hold it in an upright position.
2. Remove:
Radiator cap
3. Check:
Coolant level a
Coolant level low → Add coolant.
1Radiator
COOLANT REPLACEMENT
WARNING
Do not remove the radiator cap when the
engine is hot.
ENGINE/COOLANT LEVEL INSPECTION/
COOLANT REPLACEMENT

3 - 19
INSP
ADJ
VALVE CLEARANCE ADJUSTMENT
VALVE CLEARANCE ADJUSTMENT
NOTE:
The valve clearance should be adjusted
when the engine is cool to the touch.
The piston must be at Top Dead Center
(T.D.C.) on compression stroke to check or
adjust the valve clearance.
1. Remove:
Seat
Fuel tank
Refer to “SEAT, FUEL TANK AND SIDE
COVERS” section in the CHAPTER 4.
2. Remove:
Air cut-off valve assembly
Refer to “AIR INDUCTION SYSTEM”
section in the CHAPTER 4.
Spark plug
Engine stay (upper)
Cylinder head cover
Refer to “CAMSHAFTS” section in the
CHAPTER 4.
3. Remove:
Timing plug 1
Straight plug 2
O-ring
1
2
4. Check:
Valve clearance
Out of specification → Adjust.
Valve clearance (cold):
Intake valve:
0.10 ~ 0.15 mm
(0.0039 ~ 0.0059 in)
Exhaust valve:
0.20 ~ 0.25 mm
(0.0079 ~ 0.0098 in)
Checking steps:
Turn the crankshaft counterclockwise with
a wrench.
Align the T.D.C. mark a on the rotor with
the align mark b on the crankcase cover
when piston is at T.D.C. on compression
stroke.
b
a

3 - 22
INSP
ADJ
6. Install:
All removed parts
NOTE:
Install all removed parts in reversed order of
their removal.Locate the rounded-off value and the mea-
sured valve clearance in the chart “PAD
SELECTION TABLE”. The field where
these two coordinates intersect shows the
new pad number to use.
NOTE:
Use the new pad number only as a guide
when verifying the valve clearance adjust-
ment.
Install the new pads 6 and the valve lift-
ers 7.
NOTE:
Apply the engine oil on the valve lifters.
Apply the molybdenum disulfide oil on the
valve stem ends.
Valve lifter must turn smoothly when
rotated with a finger.
Be careful to reinstall valve lifters and
pads in their original place.
Install the camshafts (exhaust and intake),
the timing chain and the camshaft caps.
Refer to “CAMSHAFTS” section in the
CHAPTER 4.
T R..
Bolt (camshaft cap):
10 Nm (1.0 m  kg, 7.2 ft  lb)
Install the timing chain tensioner.
Refer to “CAMSHAFTS” section in the
CHAPTER 4.
NOTE:
Turn the crankshaft counterclockwise sev-
eral turns so that the installed parts settle
into the right position.
Recheck the valve clearance.
If the clearance is still incorrect, repeat all
the clearance adjustment steps until the
specified clearance is obtained.
VALVE CLEARANCE ADJUSTMENT

3 - 34
INSP
ADJ
DRIVE CHAIN SLACK ADJUSTMENT
DRIVE CHAIN SLACK ADJUSTMENT
1. Elevate the rear wheel by placing the suit-
able stand under the engine.
2. Check:
Drive chain slack a
Above the seal guard installation bolt.
Out of specification → Adjust.
NOTE:
Before checking and/or adjusting, rotate the
rear wheel through several revolutions and
check the slack several times to find the tight-
est point. Check and/or adjust the chain slack
with the rear wheel in this “tight chain” position.
Drive chain slack:
48 ~ 58 mm (1.9 ~ 2.3 in)
3. Adjust:
Drive chain slack
Drive chain slack adjustment steps:
Loosen the axle nut 1 and locknuts 2.
Adjust the chain slack by turning the
adjusters 3.
To tighten
→Turn the adjuster
3 coun-
terclockwise.
To loosen
→Turn the adjuster
3 clock-
wise and push wheel for-
ward.
Turn each adjuster exactly the same
amount to maintain correct axle alignment.
(There are marks a on each side of the
chain puller alignment.)
NOTE:
Turn the adjuster so that the chain is in line
with the sprocket, as viewed from the rear.
CAUTION:
Too small chain slack will overload the
engine and other vital parts; keep the
slack within the specified limits.

3 - 57
INSP
ADJ
REPLACING THE HEADLIGHT BULBS
3. Replace:
Blown fuse
WARNING
Never use a fuse with an amperage rating
other than that specified. Improvising or
using a fuse with the wrong amperage rat-
ing may cause extensive damage to the
electrical system, cause the starting and
ignition systems to malfunction and could
possibly cause a fire.
4. Install:
Fuse cover
Seat Replacement steps:
Set the main switch to “OFF”.
Install a new fuse of the correct amperage.
Set on the switches to verify if the electri-
cal circuit is operational.
If the fuse immediately blows again, check
the electrical circuit.
ItemsAmperage
ratingQ’ty
Main fuse 10 A 1
REPLACING THE HEADLIGHT BULBS
1. Remove:
Headlight
Refer to “SEAT, FUEL TANK AND SIDE
COVERS” section in the CHAPTER 4.
2. Remove:
Headlight bulb holder cover 1
3. Remove:
Headlight bulb holder 1
NOTE:
Remove the headlight bulb holder by pushing
it in and turning it counterclockwise.