Yamaha 2003 YZ450FR Owner's Service Manual page 178

KICK AXLE AND SHIFT SHAFT
REMOVAL POINTS
EC4B3101
Kick axle assembly
1. Remove:
G
NOTE:
Unhook the torsion spring 2 from the hole a
in the crankcase.
EC4C3101
Shift guide and shift lever assembly
1. Remove:
G
G
G
NOTE:
The shift lever assembly is disassembled at
the same time as the shift guide.
EC4N3100
Segment
1. Remove:
G
G
NOTE:
Turn the segment counterclockwise until it
stops and loosen the bolt.
INSPECTION
EC4C4200
Kick axle and ratchet wheel
1. Check:
G
G
G
EC4C4300
Kick gear, kick idle gear and ratchet wheel
1. Inspect:
G
G
G
G
G
4 - 71
ENG
Kick axle assembly 1
Bolt (shift guide)
Shift guide 1
Shift lever assembly 2
Bolt (segment) 1
Segment 2
Ratchet wheel 1 smooth movement
Unsmooth movement → Replace.
Kick axle 2
Wear/damage → Replace.
Spring 3
Broken → Replace.
Kick gear 1
Kick idle gear 2
Ratchet wheel 3
Gear teeth a
Ratchet teeth b
Wear/damage → Replace.