2010 YAMAHA WR 450F Owners Manual

Page 145 of 230

YAMAHA WR 450F 2010  Owners Manual 5-42
OIL PUMP
CHECKING THE OIL PUMP
1. Inspect:
• Oil pump drive gear
• Oil pump drive shaft
• Rotor housing
• Oil pump cover
Cracks/wear/damage→Replace.
2. Measure:
• Tip clearance "a"
(b

Page 146 of 230

YAMAHA WR 450F 2010  Owners Manual 5-43
KICK SHAFT AND SHIFT SHAFT
KICK SHAFT AND SHIFT SHAFT
REMOVING THE KICK SHAFT AND SHIFT SHAFT
Order Part name Qty Remarks
Oil pump  Refer to "OIL PUMP" section.
1 Kick idle gear 1
2 Kick shaft a

Page 147 of 230

YAMAHA WR 450F 2010  Owners Manual 5-44
KICK SHAFT AND SHIFT SHAFT
17 Pawl 2
18 Pawl pin 2
19 Spring 2
20 Bolt (stopper lever) 1
21 Stopper lever 1
22 Torsion spring 1
23 Segment 1 Refer to removal section. Order Part name Qty Remarks

Page 148 of 230

YAMAHA WR 450F 2010  Owners Manual 5-45
KICK SHAFT AND SHIFT SHAFT
REMOVING THE KICK SHAFT 
ASSEMBLY
1. Remove:
• Kick shaft assembly "1"
Unhook the torsion spring "2" from 
the hole "a" in the crankcase.
REMOVING THE SHIFT GUIDE 
AN

Page 149 of 230

YAMAHA WR 450F 2010  Owners Manual 5-46
KICK SHAFT AND SHIFT SHAFT
INSTALLING THE SHIFT GUIDE 
AND SHIFT LEVER ASSEMBLY
1. Install:
• Spring "1"
• Pawl pin "2"
•Pawl "3"
To shift lever "4".
Apply the engine oil on the spring, 
pa

Page 150 of 230

YAMAHA WR 450F 2010  Owners Manual 5-47
KICK SHAFT AND SHIFT SHAFT
INSTALLING THE KICK IDLE 
GEAR
1. Install:
• Kick idle gear "1"
• Washer "2"
• Circlip "3" 
• Apply the engine oil on the kick idle 
gear inner circumference.

Page 151 of 230

YAMAHA WR 450F 2010  Owners Manual 5-48
AC MAGNETO AND STARTER CLUTCH
AC MAGNETO AND STARTER CLUTCH
REMOVING THE AC MAGNETO AND STARTER CLUTCH
Order Part name Qty Remarks
Drain the engine oil.Refer to "CHANGING THE ENGINE OIL" 
sectio

Page 152 of 230

YAMAHA WR 450F 2010  Owners Manual 5-49
AC MAGNETO AND STARTER CLUTCH
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).
12 Woodruff key 1
13 Starter clutch as