2000 YAMAHA WR 400F warning light

3 - 24
INSP
ADJ
SPARK ARRESTER CLEANING (For USA)
WARNING
lBe sure the exhaust pipe and muffler are
cool before cleaning the spark arrester.
lDo not start the engine when cleaning the
exhaust system.
1. Remove:
lBolt (spark arrester) 1 1
1
2. Remove:
lSpark arrester 1
Pull the spark arrester out of the muf-
fler.
1
3. Clean:
lSpark arrester
Tap the spark arrester lightly, then use
a wire brush to remove any carbon
deposits.
4. Install:
lSpark arrester
Insert the spark arrester into the muffler
and align the bolt holes.
lBolt (spark arrester)
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
SPARK ARRESTER CLEANING (For USA)

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INSP
ADJ
REPLACING THE HEADLIGHT BULBS
REPLACING THE HEADLIGHT BULBS
The following procedure applies to both of the
headlight bulb.
1. Remove:
lNumber plate
Refer to “SEAT, FUEL TANK AND
SIDE COVERS” section in the CHAP-
TER 4.
2. Remove:
lHeadlight bulb holder cover 1
3. Detach:
lHeadlight bulb holder 1
4. Remove:
lHeadlight bulb 2
WARNING
Since the headlight bulb gets extremely
hot, keep flammable products and your
hands away from the bulb unit it has cooled
down.
5. Install:
lHeadlight bulb
Secure the new headlight bulb with the
headlight bulb holder.
CAUTION:
Avoid touching the glass part of the head-
light bulb to keep it free form oil, otherwise
the transparency of the glass, the life of the
bulb and the luminous flux will be
adversely affected. If the headlight bulb
gets soiled, thoroughly clean it with a cloth
moistened with alcohol or lacquer thinner.
6. Attach:
lHeadlight bulb holder
7. Install:
lHeadlight bulb holder cover
8. Install:
lNumber plate
Refer to “SEAT, FUEL TANK AND
SIDE COVERS” section in the CHAP-
TER 4.
New

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CHASFRONT BRAKE AND REAR BRAKE
2. Install:
lCopper washer 1
lUnion bolt 2
WARNING
Always use new copper washers.
CAUTION:
Install the brake hose so that its pipe por-
tion a directs as show and lightly touches
the projection b on the caliper.
New
T R..30 Nm (3.0 m · kg, 22 ft · lb)
3. Install:
lBrake hose holder 1
lCaliper 2
lBolt (caliper) 3
NOTE:
Fit the brake hose holder cut a over the pro-
jection b on the front fork and clamp the brake
hose.
4. Tighten:
lPad pin 4
5. Install:
lPad pin plug 5
T R..23 Nm (2.3 m · kg, 17 ft · lb)
T R..18 Nm (1.8 m · kg, 13 ft · lb)
T R..3 Nm (0.3 m · kg, 2.2 ft · lb)
EC5A5100
Rear caliper
1. Install:
lPad support 1
lBrake pad 2
lPad pin 3
NOTE:
lInstall the brake pads with their projections
a into the caliper recesses b.
lTemporarily tighten the pad pin at this point.

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CHASHANDLEBAR
5. Install:
lThrottle cable cap 1
lScrew (throttle cable cap) 3
lCover (throttle cable cap) 4
WARNING
After tightening the screws, check that the
throttle grip 4 moves smoothly. If it does
not, retighten the bolts for adjustment.
T R..4 Nm (0.4 m · kg, 2.9 ft · lb)
6. Install:
lMaster cylinder 1
lMaster cylinder bracket 2
lBolt (master cylinder bracket) 3
NOTE:
lInstall the bracket so that the arrow mark a
faces upward.
lFirst tighten the bolt on the upper side of the
master cylinder bracket, and then tighten the
bolt on the lower side.
7. Install:
lLights switch 1
T R..9 Nm (0.9 m · kg, 6.5 ft · lb)
8. Install:
l“ENGINE STOP” button 1
lClutch lever holder 2
lBolt (clutch lever holder) 3
lDecompressor lever holder 4
lScrew (decompressor lever holder) 5
lClamp 6
T R..4 Nm (0.4 m · kg, 2.9 ft · lb)
T R..4 Nm (0.4 m · kg, 2.9 ft · lb)

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CHASREAR SHOCK ABSORBER
EC580000
REAR SHOCK ABSORBER
Extent of removal:1 Rear shock absorber removal2 Rear shock absorber disassembly
Extent of removal Order Part name Q’ty Remarks
Preparation for removalREAR SHOCK ABSORBER
REMOVAL
Hold the machine by placing the
suitable stand under the engine.
Seat, fitting band and side covers Refer to “SEAT, FUEL TANK AND SIDE
COVERS” section in the CHAPTER 4.
Silencer Refer to “EXHAUST PIPE AND
SILENCER” section in the CHAPTER 4.
Drain the coolant. Refer to “COOLANT REPLACENENTR ”
section in the CHAPTER 3.
Coolant reservoir Refer to “RADIATOR” section in the
CHAPTER 4.
1 Tail light connector 2
2 Band 2
3 Bolt (brake reservoir tank) 1
4 Clamp (air cleaner joint) 1 Only loosening.
5 Rear frame 1
6 Bolt (rear shock absorber-relay arm) 1Hold the swingarm.
7 Bolt (rear shock absorber-frame) 1
8 Rear shock absorber 1
WARNING
Support the machine securely so there is nodanger of it falling over.
1
2

7 - 1
TUN

EC700000
TUNING
EC710000
ENGINE
Carburetor setting
l
The air/fuel mixture will vary depending on
atmospheric conditions. Therefore, it is nec-
essary to take into consideration the air pres-
sure, ambient temperature, humidity, etc.,
when adjusting the carburetor.
l
Perform a test run to check for proper engine
performance (e.g., throttle response) and
spark plug(-s) discoloration or fouling. Use
these readings to determine the best possi-
ble carburetor setting.
NOTE:

It is recommended to keep a record of all car-
buretor settings and external conditions (e.g.,
atmospheric conditions, track/surface condi-
tions, lap times) to make future carburetor set-
ting easier.
WARNING

l
The carburetor is a part of the fuel line.
Therefore, be sure to install it in a well-
ventilated area, away from flammable
objects and any sources of fire.
l
Never look into the carburetor intake.
Flames may shoot out from the pipe if the
engine backfires while it is being started.
Gasoline may be discharged from the
accelerator pump nozzle when the carbu-
retor has been removed.
CAUTION:

l
The carburetor is extremely sensitive to
foreign matter (dirt, sand, water, etc.).
During installation, do not allow foreign
matter to get into the carburetor.
l
Always handle the carburetor and its
components carefully. Even slight
scratches, bends or damage to carbure-
tor parts may prevent the carburetor from
functioning correctly. Carefully perform
all servicing with the appropriate tools
and without applying excessive force.
l
When the engine is stopped or when
riding at no load, do not open and close
the throttle unnecessarily. Otherwise, too
much fuel may be discharged, starting
may become difficult or the engine may
not run well.
SETTING
7