steering YAMAHA WR 400F 2000 User Guide

3 - 44
INSP
ADJ
STEERING HEAD INSPECTION AND ADJUSTMENT
lTighten the ring nut 3 using ring nut
wrench 4.
Ring nut wrench:
YM-33975/90890-01403
T R..
Ring nut (initial tightening):
38 Nm (3.8 m • kg, 27 ft • lb)
lLoosen the ring nut one turn.
lRetighten the ring nut using the ring nut
wrench.
T R..
Ring nut (final tightening):
7 Nm (0.7 m • kg, 5.1 ft • lb)
lCheck the steering shaft by turning it lock
to lock. If there is any binding, remove the
steering shaft assembly and inspect the
steering bearings.
lInstall the handle crown 5, steering shaft
nut 6, handlebar 7, handlebar holder 8
and number plate 9.
T R..
Steering shaft nut:
145 Nm (14.5 m • kg, 105 ft • lb)
Handlebar upper holder:
23 Nm (2.3 m • kg, 17 ft • lb)
Pinch bolt (handle crown):
23 Nm (2.3 m • kg, 17 ft • lb)
NOTE:
Set the torque wrench to the ring nut
wrench so that they form a right angle.
WARNING
Avoid over-tightening.
NOTE:
lThe upper handlebar holder should be
installed with the punched mark a for-
ward.
lInsert the end of fuel breather hose 0 into
the hole of the steering shaft.
CAUTION:
First tighten the bolts on the front side of
the handlebar holder, and then tighten
the bolts on the rear side.

5 - 44
CHASHANDLEBAR
NOTE:
lThe “ENGINE STOP” button, clutch lever
holder and clamp should be installed accord-
ing to the dimensions shown.
lPass the “ENGINE STOP” button lead in the
middle of the clutch holder.
9. Install:
lClutch cable 1
NOTE:
Apply the lithium soap base grease on the
clutch cable end.
10. Adjust:
lClutch lever free play
Refer to “CLUTCH ADJUSTMENT”
section in the CHAPTER 3.
11. Insert the end of the fuel breather hose
1 into the hole of the steering shaft.

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CHAS
EC560000
STEERING
Extent of removal:1 Under bracket removal2 Bearing removal
Extent of removal Order Part name Q’ty Remarks
STEERING REMOVAL
Refer to “HANDLEBAR” section. Preparation for removal Hold the machine by placing the
suitable stand under the engine.
Number plate
Handlebar
Cable guide
Front fender
1 Trip 1
2 Steering shaft nut 1
3 Front fork 2 Refer to “FRONT FORK” section.
4 Handle crown 1
5 Ring nut 1 Use special tool.
Refer to “REMOVAL POINTS”.
6 Under bracket 1
7Ball race cover
1
WARNING
Support the machine securely so there is nodanger of it falling over.
2
1
STEERING

5 - 46
CHASSTEERING
Extent of removal Order Part name Q’ty Remarks
8 Bearing (upper) 1
9 Bearing (lower) 1 Refer to “REMOVAL POINTS”.
10Ball race
2Refer to “REMOVAL POINTS”.
2

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CHAS
EC563000
REMOVAL POINTS
EC563202
Ring nut
1. Remove:
lRing nut 1
Use the ring nut wrench 2.
WARNING
Support the steering shaft so that it may
not fall down.
Ring nut wrench:
YU-33975/90890-01403
EC563300
Bearing (lower)
1. Remove:
lBearing (lower) 1
Use the floor chisel 2.
CAUTION:
Take care not to damage the steering shaft
thread.
EC563400
Ball race
1. Remove:
lBall race 1
Remove the ball race using long rod 2
and the hammer.
EC564000
INSPECTION
EC564200
Steering shaft
1. Inspect:
lSteering shaft 1
Bend/damage ® Replace.
STEERING

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CHASSTEERING
EC564101
Bearing and ball race
1. Wash the bearings and ball races with a
solvent.
2. Inspect:
lBearing 1
lBall race
Pitting/damage ® Replace bearings
and ball races as a set.
Install the bearing in the ball races.
Spin the bearings by hand. If the bear-
ings hang up or are not smooth in their
operation in the ball races, replace
bearings and ball races as a set.
EC565000
ASSEMBLY AND INSTALLATION
EC565112
Under bracket
1. Install:
lBearing (lower) 1
NOTE:
Apply the lithium soap base grease on the dust
seal lip and bearing inner circumference.
2. Install:
lBall race
lBearing (upper) 1
lBall race cover 2
NOTE:
Apply the lithium soap base grease on the
bearing and ball race cover lip.
3. Install:
lUnder bracket 1
NOTE:
Apply the lithium soap base grease on the
bearing and the portion a of the steering
shaft.

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CHAS
4. Install:
lPlain washer 1
lRing nut 2
Tighten the ring nut using the ring nut
wrench 3.
Refer to “STEERING HEAD INSPEC-
TION AND ADJUSTMENT” section in
the CHAPTER 3.
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)
5. Check the steering shaft by turning it lock
to lock. If there is any binding, remove
the steering shaft assembly and inspect
the steering bearings.
6. Install:
lPlain washer 1
7. Install:
lFront fork 1
lHandle crown 2
NOTE:
lTemporarily tighten the pinch bolts (under
bracket).
lDo not tighten the pinch bolts (handle crown)
yet.
8. Install:
lPlain washer 1
lSteering shaft nut 2
T R..145 Nm (14.5 m · kg, 105 ft · lb)
STEERING

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CHASSTEERING
9. After tightening the nut, check the steer-
ing for smooth movement. If not, adjust
the steering by loosening the ring nut little
by little.
10. Adjust:
lFront fork top end a
* For EUROPE
11. Tighten:
lPinch bolt (handle crown) 1
lPinch bolt (under bracket) 2
CAUTION:
Tighten the under bracket to specified
torque. If torqued too much, it may cause
the front fork to malfunction.
Front fork top end (standard) a:
5 mm (0.20 in)
*Zero mm (Zero in)
T R..23 Nm (2.3 m · kg, 17 ft · lb)
T R..20 Nm (2.0 m · kg, 14 ft · lb)

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CHASSWINGARM
EC570000
SWINGARM
Extent of removal:1 Swingarm removal
Extent of removal Order Part name Q’ty Remarks
STEERING REMOVAL
Refer to “FRONT BRAKE AND REAR
BRAKE” section.
Shift the brake pedal backward. Preparation for removal Hold the machine by placing the
suitable stand under the engine.
Brake hose holder
Rear caliper
Bolt (brake pedal)
Drive chain
1 Chain support 1
2 Chain tensioner (lower) 1
3 Bolt (rear shock absorber-relay
arm)1 Hold the swingarm.
4 Bolt (connecting rod) 1
5 Pivot shaft 1
6Swingarm
1
WARNING
Support the machine securely so there is nodanger of it falling over.
1