Yamaha WR450FB 2012, Owner'S Service Manual

Page: 256 / 392

KICKSTATER
6-45
EAS1DX3175
REMOVING THE KICK SHAFT ASSEMBLY
1. Remove:
• Kick shaft assembly “1”
TIP
Unhook the torsion spring “2” from the hole “a”
in the crankcase.
EAS1DX3176
CHECKING THE KICK SHAFT AND RATCH-
ET WHEEL
1. Check:
• Ratchet wheel “1” smooth movement
Unsmooth movement
o
Replace.
• Kick shaft “2”
Wear/damage
o
Replace the kick shaft as-
sembly.
• Spring “3”
Broken
o
Replace.
EAS1DX3177
CHECKING THE KICK GEAR, KICK IDLE
GEAR AND RATCHET WHEEL
1. Inspect:
• Kick gear “1”
Wear/damage
o
Replace the kick shaft as-
sembly.
• Kick idle gear “2”
• Ratchet wheel “3”
• Gear teeth “a”
• Ratchet teeth “b”
Wear/damage
o
Replace.
EAS1DX3178
INSTALLING THE KICK SHAFT ASSEMBLY
1. Install:
• Kick gear “1”
• Washer “2”
• Circlip “3”
• Ratchet wheel “4”
• Spring “5”
• Washer “6”
• Circlip “7”
To kick shaft “8”.
TIP
• Apply the molybdenum disulfide oil on the in-
ner circumferences of the kick gear and ratch-
et wheel.
• Align the punch mark “a” on the ratchet wheel
with the punch mark “b” on the kick shaft.
2. Install:
• Torsion spring “1”
To kick shaft “2”.
TIP
Make sure the stopper “a” of the torsion spring
fits into the hole “b” on the kick shaft.
3
1
2
a
b
3
1 2
New
New