2007 YAMAHA WR 450F oil

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ENGKICK AXLE AND SHIFT SHAFT
EC4C5000
ASSEMBLY AND INSTALLATION
Segment
1. Install:
Segment 1
Bolt (segment)
NOTE:
Align the notch a on the segment with the pin
b on the shift cam.
CAUTION:
If the segment gets an impact, it may be
damaged. Take care not to give an impact
to the segment when tightening the bolt.
T R..30 Nm (3.0 m · kg, 22 ft · lb)
EC4B5111
Stopper lever
1. Install:
Torsion spring 1
Plain washer 2
Stopper lever 3
Bolt (stopper lever) 4
NOTE:
Align the stopper lever roller with the slot on
segment.
Shift guide and shift lever assembly
1. Install:
Spring 1
Pawl pin 2
Pawl 3
To shift lever 4.
NOTE:
Apply the engine oil on the springs, pawl pins
and pawls.
2. Install:
Shift lever assembly 1
To shift guide 2.
1
2
4
3T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
1
2

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ENGKICK AXLE AND SHIFT SHAFT
3. Install:
Shift lever assembly 1
Shift guide 2
NOTE:
The shift lever assembly is installed at the
same time as the shift guide.
Apply the engine oil on the bolt (segment)
shaft.
4. Install:
Bolt (shift guide) 1
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
EC4C5301
Shift shaft
1. Install:
Roller 1
Collar 2
Torsion spring 3
Plain washer 4
Shift shaft 5
NOTE:
Apply the engine oil on the roller and shift
shaft.
2. Install:
Shift pedal
Refer to “AC MAGNETO AND STARTER
CLUTCH” section.

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ENGKICK AXLE AND SHIFT SHAFT
Kick axle assembly
1. Install:
Kick gear 1
Plain washer 2
Circlip 3
Ratchet wheel 4
Spring 5
Plain washer 6
Circlip 7
To kick axle 8.
NOTE:
Apply the molybdenum disulfide oil on the
inner circumferences of the kick gear and
ratchet wheel.
Align the punch mark a on the ratchet wheel
with the punch mark b on the kick axle.
New
New
2. Install:
Torsion 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:
Spring 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.

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ENGKICK AXLE AND SHIFT SHAFT
4. Install:
Kick axle assembly 1
Plain washer 2
NOTE:
Apply the molybdenum disulfide grease on
the contacting surfaces of the kick axle stop-
per a and ratchet wheel guide 3.
Apply the engine oil on the kick axle.
Slide the kick axle assembly into the crank-
case and make sure the kick axle stopper fits
into the ratchet wheel guide.
5. Hook:
Torsion spring 1
NOTE:
Turn the torsion spring clockwise and hook
into the proper hole a in the crankcase.
Kick idle gear
1. Install:
Kick idle gear 1
Plain washer 2
Circlip 3
NOTE:
Install the kick idle gear with its depressed
side a toward you.
Apply the engine oil on the kick idle gear
inner circumference.
New

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ENGAC MAGNETO AND STARTER CLUTCH
AC MAGNETO AND STARTER CLUTCH
Extent of removal:
1 Starter clutch/wheel gear removal
2 Rotor removal
3 Pickup coil/stator removal
Extent of removal Order Part name Q’ty Remarks
AC MAGNETO AND STATOR
REMOVAL
Preparation for removal Drain the engine oil. Refer to “ENGINE OIL REPLACEMENT”
section in the CHAPTER 3.
Seat and fuel tank Refer to “SEAT, FUEL TANK AND SIDE
COVERS” section.
Disconnect the AC magneto lead.
1 Shift pedal 1
2 Cover (torque limiter) 1
3 Torque limiter 1 Do not disassemble.
4 Crankcase cover (left) 1
5 Gasket 1
6 Dowel pin 2
13

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ENG
NOTE:
Tighten the rotor nut to 65 Nm (6.5 m  kg, 47 ft  lb), loosen and retighten the rotor nut to 65 Nm
(6.5 m  kg, 47 ft  lb).
Extent of removal Order Part name Q’ty Remarks
7 Idle gear 1
8 Bearing 1
9Shaft 1
10* Nut (rotor) 1 Refer to NOTE.
11 Rotor 1 Use special tool.
Refer to “REMOVAL POINTS”.
12 Woodruff key 1
13 Starter clutch assembly cover 1
Refer to “REMOVAL POINTS”.
14 Starter clutch 1
15 Starter clutch drive gear 1
16 Holder 1
17 Pick-up coil 1
18 Stator 1
3
21
AC MAGNETO AND STARTER CLUTCH

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ENGAC MAGNETO AND STARTER CLUTCH
EC4L5000
ASSEMBLY AND INSTALLATION
AC magneto and starter clutch
1. Install:
Stator 1
Bolt (stator) 2
Pick-up coil 3
Holder 4
Bolt 5
NOTE:
Pass the AC magneto lead 5 under the pick-
up coil.
Pass the AC magneto lead 4 under the
holder as shown.
Take care not to catch the AC magneto lead
between crankcase cover ribs.
Tighten the bolt (stator) using the T25 bit.
Apply the sealant to the grommet of the AC
magneto lead.
YAMAHA Bond No. 1215
(ThreeBond® No. 1215):
90890-85505
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
2. Install:
Starter clutch drive gear 1
NOTE:
Apply the engine oil on the starter clutch drive
gear inner circumference.

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ENG
7. Install:
Shaft 1
Bearing 2
Idle gear 2 3
NOTE:
Apply the engine oil on the shaft, bearing and
idle gear inner circumference.
8. Install:
Dowel pin
Gasket [crankcase cover (left)]
Crankcase cover (left) 1
Bolt [crankcase cover (left)]
NOTE:
Tighten the bolts in stage, using a crisscross
pattern.
New
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
9. Install:
Plain washer
Torque limiter 1
Plain washer
NOTE:
Apply the engine oil to the shaft and plain
washers.1
10. Install:
Cover (idle gear 1) 1
Bolt 2
NOTE:
Install the cover (idle gear 1) with its mark a
facing upward.
11. Connect:
AC magneto lead
Refer to “CABLE ROUTING DIAGRAM”
section in the CHAPTER 2.
12. Install:
Shift pedal 1
Bolt (shift pedal)
NOTE:
When installing the shift pedal onto the shift
shaft, be sure that the center of the shift pedal
is about 5.1 mm (0.2 in) a above the top of the
footrest.
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
T R..12 Nm (1.2 m · kg, 8.7 ft · lb)
AC MAGNETO AND STARTER CLUTCH