Yamaha MX-800, Service Manual

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ENGINE
OIL PUMP
3.
Measure:
• Inner-rotor-to-outer-rotor-tip clearance “a” and “b”
Out of specification

Replace the defective
part(s).
4.
Check:
• Oil pump operation
Rough movement

Replace the defective part(s).
CHECKING THE RELIEF VALVE
1.
Check:
• Relief valve
Damage/wear/seized

Replace.
CHECKING THE CRANKCASE COVER 2
1.
Check:
• Crankcase cover 2
Damage

Replace.
INSTALLING THE OIL PRESSURE SWITCH
1.
Check:
• Oil pressure switch
Damage

Replace.
2.
Install:
• Oil pressure switch “1”
TIP
Engage the two threads of the oil pressure switch screw
a
b
Inner-rotor-to-outer-rotor-tip clearance “a”:
0.0 mm (0.0 in)
Inner-rotor-to-outer-rotor-tip clearance “b”:
0.19–0.35 mm (0.008–0.013 in)
Relief valve operating pressure (reference
data):
342–538 kPa (3.42–5.38 kgf/cm² , 49.59–
78.01psi)
1
Oil pressure switch:
8 N·m (0.8 kgf·m, 5.8 lb·ft)
T
R
.
.