Yamaha YZ 2019 Series Owner's Service Manual page 254

Inner-rotor-to-outer-rotor-tip
clearance
0.000–0.150 mm (0.0000–0.0059
in)
Limit
0.23 mm (0.0091 in)
Outer-rotor-to-oil-pump-housing
clearance
0.13–0.18 mm (0.0051–0.0071 in)
Limit
0.25 mm (0.0098 in)
Oil-pump-housing-to-inner-and-
outer-rotor clearance
0.06–0.11 mm (0.0024–0.0043 in)
Limit
0.18 mm (0.0071 in)
1
2
3
1. Inner rotor
2. Outer rotor
3. Oil pump housing
3. Check:
• Oil pump operation
Rough movement  Repeat steps (1) and
(2) or replace the defective part(s).
EAM30137
ASSEMBLING THE OIL PUMP
1. Install:
• Oil pump drive shaft "1"
• Inner rotor "2"
• Dowel pin "3"
OIL PUMP AND BALANCER GEAR
TIP
• Apply the engine oil on the oil pump drive shaft
and inner rotor.
• Fit the dowel pin into the groove in the inner ro-
tor.
3
2. Install:
• Outer rotor "1"
b
TIP
Apply the engine oil on the outer rotor.
a
3. Install:
c
• Oil pump cover "1"
• Oil pump cover screw "2"
EAM30138
INSTALLING THE OIL PUMP AND
BALANCER GEAR
1. Install:
• Oil pump assembly "1"
5-55
1
E
Oil pump cover screw
2.0 N·m (0.20 kgf·m, 1.5 lb·ft)
1
2
2
1