Removing The Rocker Arms And Rocker Arm Shafts; Checking The Rocker Arms And Rocker Arm Shafts - Yamaha SR400 2014 Service Manual

EAS2RD1040
REMOVING THE ROCKER ARMS AND
ROCKER ARM SHAFTS
1. Remove:
• Lock washer "1"
TIP
Straighten the lock washer tab and remove the
bolt "2".
2
2. Remove:
• Intake rocker arm shaft "1"
• Intake rocker arm "2"
• Exhaust rocker arm shaft
• Exhaust rocker arm
TIP
Remove the rocker arm shafts with the weight
"3" and slide hammer bolt "4".
Slide hammer bolt
90890-01083
Slide hammer bolt 6 mm
YU-01083-1
Weight
90890-01084
Weight
YU-01083-3
2
EAS23880
CHECKING THE ROCKER ARMS AND
ROCKER ARM SHAFTS
The following procedure applies to all of the
rocker arms and rocker arm shafts.
1. Check:
• Rocker arm
1
1
4
3
Damage/wear  Replace.
2. Check:
• Rocker arm shaft
Blue discoloration/excessive
ting/scratches  Replace or check the lubri-
cation system.
3. Measure:
• Rocker arm inside diameter "a"
Out of specification  Replace.
Rocker arm inside diameter
12.000–12.018 mm
(0.4724–0.4731 in)
Limit
12.033 mm (0.4737 in)
a
4. Measure:
• Rocker arm shaft outside diameter "a"
Out of specification  Replace.
Rocker arm shaft outside diame-
ter
11.985–11.991 mm
(0.4718–0.4721 in)
Limit
11.954 mm (0.4706 in)
5-14
ROCKER ARMS
wear/pit-