Removing The Primary Drive Gear; Removing The Kick Shaft Assembly; Checking The Kick Gear And Kick Idle Gear; Installing The Kick Shaft Assembly - Yamaha YZ125 2021 Owner's Service Manual

EAM30570

REMOVING THE PRIMARY DRIVE GEAR

1. Loosen:
• Primary drive gear bolt "1"
TIP
Place an aluminum plate "a" between the teeth
of the primary drive gear "2" and driven gear "3".
EAM30101

REMOVING THE KICK SHAFT ASSEMBLY

1. Remove:
• Kick shaft assembly "1"
TIP
Unhook the torsion spring "2" from the hole "a" in
the crankcase.
EAM30616
CHECKING THE KICK GEAR AND KICK IDLE
GEAR
1. Check:
• Kick gear "1"
Wear/damage  Replace the kick shaft as-
sembly.
• Kick idle gear "2"
• Gear teeth "a"
Wear/damage  Replace.
EAM30104

INSTALLING THE KICK SHAFT ASSEMBLY

1. Install:
• Kick gear "1"
• Washer "2"
• Torsion spring "3"
(to kick shaft "4")
TIP
Make sure the stopper "a" of the torsion spring
fits into the hole "b" on the kick shaft.
2. Install:
• Spring guide "1"
TIP
Slide the spring guide into the kick shaft, make
sure the groove "a" in the spring guide fits on the
stopper of the torsion spring.
3. Install:
• Kick shaft assembly "1"
TIP
• Apply the transmission oil on the kick shaft.
5-20
KICKSTARTER