Yamaha 2011 FZ8NA(C), Service Manual, Page: 279 / 478

OIL PUMP
5-60
EAS24930
REMOVING THE OIL PAN
1. Remove:
• Oil level switch “1”
• Oil pan “2”
• Oil pan gasket
• Dowel pins
TIP
Loosen each bolt 1/4 of a turn at a time, in
stages and in a crisscross pattern. After all of
the bolts are fully loosened, remove them.
EAS25620
CHECKING THE SPROCKET AND CHAIN
1. Check:
• Oil/water pump assembly drive sprocket
“1”
Cracks/damage/wear
→
Replace.
2. Check:
• Oil/water pump assembly drive chain “1”
Damage/stiffness
→
Replace the oil/
water pump assembly drive chain and oil/
water pump assembly drive sprocket as a
set.
EAS24960
CHECKING THE OIL PUMP
1. Check:
• Oil pump driven gear “1”
• Oil pump housing “2”
Cracks/damage/wear
→
Replace the
defective part(s).
2. Measure:
• Inner-rotor-to-outer-rotor-tip clearance “a”
• Outer-rotor-to-oil-pump-housing clear-
ance “b”
• Oil-pump-housing-to-inner-rotor-and-
outer-rotor clearance “c”
Out of specification
→
Replace the defec-
tive part(s).
Inner-rotor-to-outer-rotor-tip
clearance
Less than 0.12 mm (0.0047 in)
Limit
0.20 mm (0.0079 in)
Outer-rotor-to-oil-pump-hous-
ing clearance
0.09–0.19 mm (0.0035–0.0075
in)
Limit
0.26 mm (0.0102 in)
Oil-pump-housing-to-inner-and-
outer-rotor clearance
0.06–0.13 mm (0.0024–0.0051
in)
Limit
0.20 mm (0.0079 in)