Yamaha YZ450FA 2011 Owner's Service Manual page 168

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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 AND SHIFT
LEVER ASSEMBLY
1. Remove:
• Bolt (shift guide)
• Shift guide "1"
• Shift lever assembly "2"
The shift lever assembly is disassembled at the
same time as the shift guide.
REMOVING THE SEGMENT
1. Remove:
• Bolt (segment) "1"
• Segment "2"
Turn the segment counterclockwise until it
stops and loosen the bolt.
If the segment gets an impact, it may be
damaged. Take care not to give an impact to
the segment when removing the bolt.
KICK SHAFT AND SHIFT SHAFT
CHECKING THE KICK SHAFT AND
RATCHET WHEEL
1. Check:
• Ratchet wheel "1" smooth movement
Unsmooth movement → Replace.
• Kick shaft "2"
Wear/damage → Replace.
• Spring "3"
Broken → Replace.
CHECKING THE KICK GEAR, KICK IDLE
GEAR AND RATCHET WHEEL
1. Inspect:
• Kick gear "1"
• Kick idle gear "2"
• Ratchet wheel "3"
• Gear teeth "a"
• Ratchet teeth "b"
Wear/damage → Replace.
4-57

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