2007 YAMAHA WR 450F battery

1 - 10
GEN
INFO
CONTROL FUNCTIONS
EC150000
CONTROL FUNCTIONS
MAIN SWITCH
Functions of the respective switch positions
are as follows:
ON:
The engine can be started only at this position.
OFF:
All electrical circuits are switched off.
Main switch indicator light
The main switch 1 is equipped with an indica-
tor light 2 to avoid forgetting to turn it off. This
light functions as follows.
It lights up with the main switch “ON”.
It goes out when the engine increases its
speed after being started.
It lights up again when the engine is stopped.
NOTE:
If the indicator light will not light up with the
main switch “ON”, it shows a lack of the battery
voltage. Recharge the battery.
EC151000
“ENGINE STOP” BUTTON
The “ENGINE STOP” button 1 is located on
the left handlebar. Continue pushing the
“ENGINE STOP” button till the engine comes
to a stop.
START SWITCH
The start switch 1 is located on the right han-
dlebar. Push this switch to crank the engine
with the starter.

1 - 23
GEN
INFO
STARTING AND BREAK-IN
NOTE:
If the engine fails to start by pushing the start
switch, release the switch, wait a few seconds,
and then try again. Each starting attempt
should be as short as possible to preserve the
battery. Do not crank the engine more than
10 seconds on any one attempt. If the engine
does not start with the starter motor, try using
the kickstarter.
WARNING
If the starter motor will not turn when
pushing the start switch, stop pushing it
immediately and kick start the engine in
order to avoid the load on the motor.
Do not open the throttle while kicking the
kickstarter. Otherwise, the kickstarter
may kick back.
7. Return the cold starter knob to its original
position and run the engine at 3,000 ~
5,000 r/min for 1 or 2 minutes.
NOTE:
Since this model is equipped with an accelera-
tor pump, if the engine is raced (the throttle
opened and closed), the air/fuel mixture will be
too rich and the engine may stall. Also unlike a
two-stroke engine, this model can idle.
CAUTION:
Do not warm up the engine for extended
periods of time.

SPEC
2 - 3 Brake:
Front brake type Single disc brake
Operation Right hand operation
Rear brake type Single disc brake
Operation Right foot operation
Suspension:
Front suspension Telescopic fork
Rear suspension Swingarm (link type monocross suspension)
Shock absorber:
Front shock absorber Coil spring/oil damper
Rear shock absorber Coil spring/gas, oil damper
Wheel travel:
Front wheel travel 300 mm (11.8 in)
Rear wheel travel 305 mm (12.0 in)
Electrical:
Ignition system CDI
Generator system AC magneto
Battery type YTZ7S
Battery voltage/capacity 12 V/6 AH
Specific gravity 1.310
Headlight type: Quartz bulb (halogen)
Bulb wattage × quantity:
Headlight 12 V 35/36.5 W × 1
Taillight 12 V 1.6/0.3 W × 1
GENERAL SPECIFICATIONS

2 - 23
SPECCABLE ROUTING DIAGRAM
EC240000
CABLE ROUTING DIAGRAM
1Fuel tank breather hose
2Clamp
3Diode
4Hot starter cable
5Throttle position sensor lead
6Wire harness
7Hump (frame)
8Negative battery lead
9Starter motor lead
0Neutral switch lead
AAC magneto lead
BBrake hose
CRectifier/regulator leadDCarburetor breather hose
ECarburetor overflow hose
FCatch tank breather hose

2 - 28
SPECCABLE ROUTING DIAGRAM
1Clamp
2Positive battery lead
3Battery
4Negative battery lead
5Taillight coupler
6CDI unit coupler (6-pin)
7CDI unit coupler (3-pin)
8CDI unit coupler (6-pin)ÈFasten the wire harness to the upper engine
bracket (left side). Locate the clamp end facing
toward the upper side of the frame with the tie
end cut off on the inside of the frame.
ÉFasten the wire harness to the upper engine
bracket (left side). Locate the clamp end facing
toward the upper side of the frame with the tie
end cut off on the inside of the frame. Clamp the
wire harness at the marking.
ÊPass the starter motor lead through the hole in
the relay holder.
ËFit the cover securely.
ÌConnect the wire harness to the starter relay.

2 - 29
SPECCABLE ROUTING DIAGRAM
ÍFasten the catch tank breather
hose and catch tank hose to the
rear frame. Clamp them close
to where they are joined to the
frame. Fasten the pipe tightly
enough not to crush it. Locate
the clamp end facing toward the
rear of the frame with the tie
end facing downward.
ÎFasten the (three) CDI unit
leads and taillight lead to the
rear frame. Locate the clamp
end facing toward the upper
side of the frame and cut off the
tie end.
ÏConnect the negative battery
lead to the battery negative ter-
minal.
ÐConnect the negative battery
lead to the wire harness.ÑFasten the wire harness to the
rear frame. Locate the clamp
end facing toward the upper
side of the frame and the tie
end toward the inside of the
frame. Clamp the wire harness
at the marking.
ÒPass the wire harness, starter
relay lead, starting circuit cut-off
relay lead and negative battery
lead through the hole in the
relay holder.
ÓFasten the (three) CDI unit
leads and taillight lead to the
rear frame. Locate the clamp
end facing toward the lower
side of the frame and cut off the
tie end.ÔFasten the taillight lead to the
rear frame. Locate the clamp
end facing toward the upper
side of the frame and cut off the
tie end.
ÕDo not allow the taillight lead to
slacken.
ÖLocate the CDI unit lead
between the CDI unit and rear
fender.
×Locate the CDI unit coupler in
the clearance between the
upper side of the CDI unit and
lower side of the catch tank
stay.
ØLocate the CDI unit lead
between the CDI unit and rear
frame.

3 - 3
INSP
ADJ
MAINTENANCE INTERVALS
* marked: For USA
FRONT FORKS
Inspect and adjust
Replace oil Suspension oil “S1”
Replace oil seal
FRONT FORK OIL SEAL AND DUST
SEAL
Clean and lube Lithium base grease
PROTECTOR GUIDE
Replace
REAR SHOCK ABSORBER
(After
rain ride)
Inspect and adjust
Lube
Molybdenum disulfide
grease
Retighten
DRIVE CHAIN GUARD AND ROLL-
ERS
Inspect
SWINGARM
Molybdenum disulfide
grease
Inspect, lube and retighten
RELAY ARM, CONNECTING ROD
Molybdenum disulfide
grease
Inspect, lube and retighten
SIDESTAND
Lubricate Lithium base grease
STEERING HEAD
Inspect free play and retighten
Clean and lube Lithium base grease
Replace bearing
TIRE, WHEELS
Inspect air pressure, wheel run-out,
tire wear and spoke looseness
Retighten sprocket bolt
Inspect bearings
Replace bearings
Lubricate Lithium base grease
THROTTLE, CONTROL CABLE
Yamaha cable lube or
SAE 10W-30 motor oil Check routing and connection
Lubricate
HOT STARTER, CLUTCH LEVER
Inspect free play
BATTERY
Check terminal for looseness and
corrosionItemAfter
break-inEvery
race
Every
third
(or
500 km)Every
fifth
(or
1,000 km)As re-
quiredRemarks

3 - 50
INSP
ADJ
BATTERY INSPECTION AND CHARGING
WARNING
Batteries generate explosive hydrogen gas
and contain electrolyte which is made of
poisonous and highly caustic sulfuric acid.
Therefore, always follow these preventive
measures:
Wear protective eye gear when handling
or working near batteries.
Charge batteries in a well-ventilated area.
Keep batteries away from fire, sparks or
open flames (e.g., welding equipment,
lighted cigarettes).
DO NOT SMOKE when charging or han-
dling batteries.
KEEP BATTERIES AND ELECTROLYTE
OUT OF REACH OF CHILDREN.
Avoid bodily contact with electrolyte as it
can cause severe burns or permanent eye
injury.
FIRST AID IN CASE OF BODILY CONTACT:
EXTERNAL
Skin — Wash with water.
Eyes — Flush with water for 15 minutes
and get immediate medical attention.
INTERNAL
Drink large quantities of water or milk fol-
lowed with milk of magnesia, beaten egg
or vegetable oil. Get immediate medical
attention.
CAUTION:
Charging time, charging amperage and
charging voltage for an MF battery are dif-
ferent from those of conventional batteries.
The MF battery should be charged as
explained in the charging method illustra-
tions. If the battery is overcharged, the
electrolyte level will drop considerably.
Therefore, take special care when charging
the battery.
BATTERY INSPECTION AND CHARGING