Yamaha MT-09 2021 - Page 126

3-30
PERIODIC MAINTENANCE
WARNING
EWA12980
The engine, muffler and engine oil are ex-
tremely hot.
4. Install:
• Oil pressure gauge joint 18 mm “1”
• Oil pressure switch joint bolt “2”
5. Install:
• Oil pressure gauge “1”
• Adapter C “2”
6. Start the engine, warm it up for several min-
utes.
NOTICE
ECA13410
When the engine is cold, the engine oil will
have a higher viscosity, causing the engine
oil pressure to increase. Therefore, be sure
to measure the engine oil pressure after
warming up the engine.
7. Measure:
• Engine oil pressure
(at the following conditions)
Out of specification → Check.
8. Remove:
• Oil pressure gauge
• Adapter C
• Oil pressure switch joint bolt
• Oil pressure switch joint (with the O-ring)
9. Install:
• O-ring “1”
• Oil pressure switch joint (with the oil pressure
switch) “2”
• Oil pressure switch joint bolt “3”
Oil pressure gauge joint 18 mm
90890-04176
YU-04176
Oil pressure switch joint bolt
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Oil pressure gauge set
90890-03120
1
2
T
R
.
.
1
2
1
2
Oil pressure
300.0 kPa/5000 r/min at 100 °C
(43.5 psi/5000 r/min at 212 °F)
Engine oil pressure Possible causes
Below specification • Faulty oil pump
• Clogged oil filter
• Leaking oil passage
• Broken or damaged
oil seal
Above specification • Faulty oil filter
• Oil viscosity too high
Oil pressure switch joint bolt
10 N·m (1.0 kgf·m, 7.4 lb·ft)
New
T
R
.
.
1
2
3
New