Yamaha Wr 450 F Owners Manual

2 - 24
SPECCABLE ROUTING DIAGRAM
ÏFasten the wire harness, TPS
lead (in the wire harness),
starter motor lead and negative
battery lead to the frame with a
plastic locking tie and cut off
the tie end.
ÌMake sure that the TPS cou-
pler does not go out the chas-
sis.
ÓFasten the TPS lead to the
frame with a plastic band.
ÈFasten the neutral switch lead
and oil hose together with the
plastic locking ties and cut off
the tie ends.
ÔPass the cylinder head
breather hose through the hose
holder.Fasten the...

2 - 25
SPECCABLE ROUTING DIAGRAM
1Hot starter cable
2Clutch cable
3Throttle cable (return)
4Throttle cable (pull)
5Ignition coil
6Negative battery lead
7Starter motor lead
8Coolant reservoir tank
breather hose
9Rectifier/regulator
0Cable holder
ACoolant reservoir hose
BRectifier/regulator lead
CClamp
DCDI unit lead
ECDI unit 
FCDI unit band
GCDI unit stay (frame)
HCable bracketIRectifier/regulator bracket
ÅPass the throttle cables, clutch
cable and hot starter cable through
the cable guides.
ıPass the...

2 - 26
SPECCABLE ROUTING DIAGRAM
1Master cylinder
2Brake hose holder 
3Brake hoseÅInstall the brake hose so that its
pipe portion directs as shown and
lightly touches the projection on
the caliper.
ıPass the brake hose into the
brake hose holders.
ÇIf the brake hose contacts the
spring (rear shock absorber), cor-
rect its twist.
ÎInstall the brake hose so that its
pipe portion directs as shown and
lightly touches the projection on
the master cylinder. 

2 - 27
SPECCABLE ROUTING DIAGRAM
1Starter motor lead
2Negative battery lead
3Wire harness
4Clamp
5Taillight lead
6Coolant reservoir tank
breather hose
7Coolant reservoir hose
8Positive battery lead
9Starting circuit cut-off 
relay
0BatteryÅPosition the starter motor lead,
negative battery lead and wire
harness in the tank damper slit.
ıFasten the wire harness to the
frame with a plastic locking tie and
cut off the tie end.
ÇDo not allow the taillight lead to
slacken.
ÎPass the starter motor lead and...

2 - 28
SPECCABLE ROUTING DIAGRAM
1Throttle cable 
2Brake hose 
3Clamp
4Lights switch lead
5Hot starter cable
6Clutch cable
7Hose guide
8Clutch switch lead
9“ENGINE STOP” button
lead
0Trip meter cable
AMain switch lead
BTrip meter
CMain switch
DLights switch
EStart switch leadÅFasten the start switch lead and
lights switch lead to the handlebar
with a plastic band.
ıFasten the “ENGINE STOP” but-
ton lead and clutch switch lead to
the handlebar with the plastic
bands.
ÇPass the brake hose through the
hose...

 
3 - 1
INSP
ADJ
 
MAINTENANCE INTERVALS 
EC300000 
REGULAR INSPECTION AND ADJUSTMENTS 
MAINTENANCE INTERVALS 
The following schedule is intended as a general guide to maintenance and lubrication. Bear in mind
that such factors as weather, terrain, geographical location, and individual usage will alter the
required maintenance and lubrication intervals. If you are a doubt as to what intervals to follow in
maintaining and lubricating your machine, consult your Yamaha dealer. 
ItemAfter 
break-inEvery...

 
3 - 2
INSP
ADJ
 
MAINTENANCE INTERVALS 
SHIFT FORK, SHIFT CAM, GUIDE BAR
Inspect 
● 
 Inspect wear
ROTOR NUT
Retighten 
● 
  
● 
 
MUFFLER
Inspect and retighten
Clean
Replace 
● 
  
● 
  
● 
  
● 
  * Whichever comes first
*SPARK ARRESTER
Clean 
(Every 
six 
months) 
● 
CRANK
Inspect and clean 
● 
  
● 
 
CARBURETOR
Inspect, adjust and clean 
● 
  
● 
 
SPARK PLUG
Inspect and clean
Replace 
● 
  
● 
  
● 
 
DRIVE CHAIN
Lubricate, slack, alignment
Replace 
● 
  
● 
  
● 
 Use chain lube
Chain slack: 40...

 
3 - 3
INSP
ADJ
 
MAINTENANCE INTERVALS 
* marked: For USA 
FRONT FORKS
Inspect and adjust
Replace oil
Replace oil seal 
● 
  
● 
  
● 
  
● 
  
● 
 Suspension oil “01”
FRONT FORK OIL SEAL AND DUST 
SEAL
Clean and lube 
● 
  
● 
  Lithium base grease
REAR SHOCK ABSORBER
Inspect and adjust
Lube
Retighten 
● 
  
● 
  
● 
  
● 
  
● 
  
(After 
rain ride) 
● 
 Molybdenum disulfide 
grease
CHAIN GUARD AND ROLLERS
Inspect
● ● 
SWINGARM
Inspect, lube and retighten
● ● Molybdenum disulfide 
grease
RELAY ARM,...

3 - 4
INSP
ADJ
PRE-OPERATION INSPECTION AND MAINTENANCE
EC320000
PRE-OPERATION INSPECTION AND MAINTENANCE
Before riding for break-in operation, practice or a race, make sure the machine is in good operating
condition.
Before using this machine, check the following points.
GENERAL INSPECTION AND MAINTENANCE 
Item Routine Page
CoolantCheck that coolant is filled up to the radiator filler cap.
Check the cooling system for leakage.P.3-5 ~ 9
FuelCheck that a fresh gasoline is filled in the fuel tank. Check...

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...