oil YAMAHA WR 400F 2000 Manual PDF

ENG
4 - 60
Extent of removal Order Part name Q’ty Remarks
13 Pin 1
14 Washer 1
15 Oil pump drive shaft 1
16 Rotor housing 1
2
OIL PUMP

4 - 61
ENG

OIL PUMP
INSPECTION
Oil pump
1. Inspect:
l
Oil pump drive gear
l
Oil pump driven gear
l
Rotor housing
l
Oil pump cover
Cracks/wear/damage
®
Replace.
2. Measure:
l
Tip clearance
a

Between the inner rotor
1
and the
outer rotor
2
.
l
Side clearance
b

Between the outer rotor
2
and the rotor
housing
3
.
Out of specification
®
Replace the oil
pump.
Tip clearance
a
:
0.07 ~ 0.12 mm (0.0028 ~ 0.0047 in)
: 0.15 mm (0.006 in)
Tip clearance
b
:
0.09 ~ 0.15 mm (0.0035 ~ 0.0059 in)
: 0.22 mm (0.009 in)
Side clearance
c
:
0.03 ~ 0.08 mm (0.0012 ~ 0.0031 in)
: 0.15 mm (0.006 in)
3. Check:
l
Unsmooth
®
Repeat steps #1 and #2
or replace the defective parts.
ASSEMBLY AND INSTALLATION
Oil pump
1. Install:
l
Oil pump drive shaft
1

l
Washer
2

l
Pin
3

l
Inner rotor 1
4

NOTE:

Fit the pin into the groove in the inner rotor 1.

4 - 62
ENG

OIL PUMP
2. Install:
l
Outer rotor 1
1

NOTE:

Align the match mark
a
on the inner rotor 1
with the match mark
b
on the outer rotor 1.
3. Install:
l
Oil pump cover
1

l
Screw (oil pump cover)
2

l
Pin
3

l
Inner rotor 2
4

l
Circlip
5

NOTE:

Fit the pin into the groove in the inner rotor 2.
T R..4 Nm (0.4 m · kg, 2.9 ft · lb)
New

4. Install:
l
Outer rotor 2
1

l
Dowel pin
2

l
Oil pump assembly
3

l
Bolt (oil pump assembly)
4

T R..10 Nm (1.0 m · kg, 7.2 ft · lb)

5. Install:
l
Oil pump drive gear
1

l
Plate washer
2

l
Circlip
3

New

ENG

4 - 63
KICK AXLE AND SHIFT SHAFT
KICK AXLE AND SHIFT SHAFT
KICK AXLE AND SHIFT SHAFT
Extent of removal:
1 Kick axle removal2 Kick axle disassembly
3 Shift shaft4 Segment removal
Extent of removal Order Part name Q’ty Remarks
KICK AXLE AND SHIFT SHAFT
REMOVAL
Preparation for removal Shift pedal Refer to “ENGINE REMOVAL” section.
Oil pump Refer to “OIL PUMP” section.
1 Kick idle gear 1
2 Kick axle assembly 1 Refer to “REMOVAL POINTS”.
3 Spring guide 1
4 Torsion spring 1
5 Ratchet wheel 1
6 Kick gear 1
7 Kick axle 1
8 Plain washer 1
9 Shift shaft 1
10 Collar 1
11 Torsion spring 1
12 Roller 1
3
2
1
4
1

4 - 67
ENGKICK AXLE AND SHIFT SHAFT
EC4C5202
Shift guide and shift lever assembly
1. Install:
lSpring 1
lPawl pin 2
lPawl 3
To shift lever 4.
2. Install:
lShift lever assembly 1
To shift guide 2.
3. Install:
lShift lever assembly 1
lShift guide 2
NOTE:
lThe shift lever assembly is installed at the
same time as the shift guide.
lApply the engine oil on the bolt (segment)
shaft.
4. Install:
lBolt (shift guide) 1
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
EC4C5301
Shift shaft
1. Install:
lRoller 1
lCollar 2
lTorsion spring 3
lShift shaft 4
NOTE:
Apply the engine oil on the roller and shift
shaft.

4 - 68
ENGKICK AXLE AND SHIFT SHAFT
EC4B5302
Kick axle assembly
1. Install:
lKick gear 1
lRatchet wheel 2
NOTE:
Align the punched mark a on the ratchet
wheel with the punched mark b on the kick
axle.
2. Install:
lTorsion spring 1
To kick axle 2.
NOTE:
Make sure the stopper a of the torsion spring
fits into the hole b on the kick axle.
3. Install:
lSpring guide 1
NOTE:
Slide the spring guide into the kick axle, make
sure the groove a in the spring guide fits on
the stopper of the torsion spring.
4. Install:
lKick axle assembly 1
lPlain washer 2
NOTE:
lApply the engine oil on the kick axle.
lSlide the kick axle assembly into the crank-
case, make sure the kick axle stopper a fit
into their home position b.
5. Hook:
lTorsion spring 1
NOTE:
Turn the torsion spring clockwise and hook
into the proper hole a in the crankcase.

4 - 69
ENGKICK AXLE AND SHIFT SHAFT
EC4C5412
Kick idle gear
1. Install:
lKick idle gear 1
lPlain washer 2
lCirclip 3
NOTE:
lApply the engine oil on the kick idle gear
inner circumference.
lInstall the kick idle gear with its depressed
side a toward you.
New

ENG
4 - 74
ENGINE REMOVAL
EC4M0000
ENGINE REMOVAL
Extent of removal Order Part name Q’ty Remarks
ENGINE REMOVAL
Preparation for removal Hold the machine by placing the
suitable stand under the frame.
Seat and fuel tank Refer to “SEAT, FUEL TANK AND SIDE
COVERS” section.
Carburetor Refer to “CARBURETOR” section.
Exhaust pipe and silencer Refer to “EXHAUST PIPE AND
SILENCER” section.
Clutch cable Disconnect at engine side.
Decompression cable and guide Disconnect at engine side.
Radiator Refer to “RADIATOR” section.
Shift pedal Refer to “CDI MAGNETO” section.
Cylinder head breather hose and
oil tank breather hoseRefer to “CAMSHAFTS” section.
Drain the engine oil Refer to “ENGINE OIL REPLACEMENT”
section in the CHAPTER 3.
Spark plug cap
Disconnect the CDI magneto lead.
WARNING
Support the machine securely so there is nodanger of it falling over.

ENG
4 - 75
ENGINE REMOVAL
Extent of removal:1 Engine removal
Extent of removal Order Part name Q’ty Remarks
1 Engine skidplate 1
2 Neutral switch 1
3 Engine oil hose 2
4 Chain cover 1
Refer to “REMOVAL POINTS”. 5 Nut (drive sprocket) 1
6 Lock washer 1
7 Drive sprocket 1
8 Clip 1
9 Bolt (brake pedal) 1
10 Brake pedal 1
11 Engine upper bracket (right) 1
12 Engine upper bracket (left) 1
13 Engine lower bracket 2
14 Engine mounting bolt 3
15 Pivot shaft 1
Refer to “REMOVAL POINTS”.
16 Engine 1
1

4 - 78
ENGENGINE REMOVAL
2. Install:
lLock washer 1
lNut (drive sprocket) 2
NOTE:
Tighten the nut while applying the rear brake.
New
T R..75 Nm (7.5 m · kg, 54 ft · lb)
3. Bend the lock washer tab to lock the nut.
4. Install:
lChain guide
lChain cover 1
lBolt (chain cover) 2
T R..8 Nm (0.8 m · kg, 5.8 ft · lb)
5. Install:
lEngine oil hose 1
lBolt (engine oil hose) 2
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
6. Install:
lSpring 1
lPin 2
lNeutral switch 3
lBolt (neutral switch) 4
T R..4 Nm (0.4 m · kg, 2.9 ft · lb)