Checking The Primary Sheave; Checking The Secondary Sheave - Yamaha YXR70FX Service Manual

PRIMARY AND SECONDARY SHEAVES
EBS00274

CHECKING THE PRIMARY SHEAVE

1. Check:
• weight outside diameter a
Out of specification → Replace the weight.
Weight outside diameter
30 mm (1.18 in)
<Limit>: 29.5 mm (1.16 in)
2. Check:
• primary pulley slider
• primary sliding sheave splines
Wear/cracks/damage → Replace.
• primary pulley cam
Cracks/damage → Replace.
3. Check:
• primary sliding sheave
• primary fixed sheave
Cracks/damage → Replace.
EBS00275

CHECKING THE SECONDARY SHEAVE

1. Check:
• secondary fixed sheave smooth operation
• secondary sliding sheave smooth operation
Scratches/damage → Replace as a set.
2. Check:
• torque cam grooves 1
Wear/damage → Replace.
3. Check:
• guide pins 2
Wear/damage → Replace.
4. Check:
• secondary sheave spring
Damage → Replace.
4 - 60
ENG