Yamaha YZ 2017 Series, Owner'S Service Manual

Page: 246 / 410

CLUTCH
5-45
EASB29B243
CHECKING THE CLUTCH HOUSING
1. Check:
• Clutch housing dogs “a”
Damage/pitting/wear

Deburr the clutch
housing dogs or replace the clutch housing.
TIP
Pitting on the clutch housing dogs will cause er-
ratic clutch operation.
EASB29B244 CHECKING THE CLUTCH BOSS
1. Check:
• Clutch boss splines
Damage/pitting/wear

Replace the clutch
boss.
TIP
Pitting on the clutch boss splines will cause er-
ratic clutch operation.
EASB29B245
CHECKING THE PRESSURE PLATE
1. Check:
• Pressure plate
Crack/damage

Replace.
EASB29B246
CHECKING THE PUSH LEVER SHAFT
1. Check:
• Push lever shaft
Wear/damage

Replace.
EASB29B247 CHECKING THE CLUTCH PUSH RODS
1. Check:
• Push rod 1 “1”
• Bearing “2”
• Washer “3”
• Push rod 2 “4”
• Ball “5”
Cracks/damage/wear

Replace.
2. Measure:
• Push rod 2 bending limit
Out of specification

Replace.
EASB29B248
CHECKING THE PRIMARY DRIVE GEAR
1. Check:
• Primary drive gear
Damage/wear

Replace the primary drive
and primary driven gears as a set.
Excessive noise during operation

Re-
place the primary drive and primary driven
gears as a set.
2. Check:
• Primary-drive-gear-to-primary-driven-gear
free play
Free play exists

Replace the primary
drive and primary driven gears as a set.
a
Push rod bending limit
0.30 mm (0.012 in)