Yamaha MT-09 2021 - Checking the Cylinder Head Breather Hose; Checking the Exhaust System; Checking the Throttle Body Joints

3-10
PERIODIC MAINTENANCE
3. Install:
• Service hose cap
4. Install:
• Air filter case
Refer to “GENERAL CHASSIS (2)” on
page 4-10.
• Fuel tank
Refer to “FUEL TANK” on page 7-1.
• Fuel tank center cover
Refer to “GENERAL CHASSIS (1)” on
page 4-1.
• Rider seat
Refer to “GENERAL CHASSIS (1)” on
page 4-1.
EAS30798
CHECKING THE THROTTLE BODY JOINTS
1. Remove:
• Throttle body
Refer to “THROTTLE BODIES” on page 7-5.
2. Check:
• Throttle body joint
Cracks/damage → Replace.
3. Install:
• Throttle body
Refer to “THROTTLE BODIES” on page 7-5.
EAS30623
CHECKING THE CYLINDER HEAD
BREATHER HOSE
1. Remove:
• Rider seat
Refer to “GENERAL CHASSIS (1)” on
page 4-1.
• Fuel tank center cover
Refer to “GENERAL CHASSIS (1)” on
page 4-1.
• Fuel tank
Refer to “FUEL TANK” on page 7-1.
• Air filter case
Refer to “GENERAL CHASSIS (2)” on
page 4-10.
2. Check:
• Cylinder head breather hose “1”
Cracks/damage → Replace.
Loose connection → Connect properly.
NOTICE
ECA14920
Make sure the cylinder head breather hose is
routed correctly.
3. Install:
• Air filter case
Refer to “GENERAL CHASSIS (2)” on
page 4-10.
• Fuel tank
Refer to “FUEL TANK” on page 7-1.
• Fuel tank center cover
Refer to “GENERAL CHASSIS (1)” on
page 4-1.
• Rider seat
Refer to “GENERAL CHASSIS (1)” on
page 4-1.
EAS30625
CHECKING THE EXHAUST SYSTEM
1. Check:
• Muffler assembly “1”
Cracks/damage → Replace.
•Gasket “2”
Exhaust gas leaks → Replace.
2. Check:
Tightening torque
• Exhaust pipe nut “3”
• Muffler bolt “4”
Exhaust pipe nut
20 N·m (2.0 kgf·m, 15 lb·ft)
Muffler bolt
20 N·m (2.0 kgf·m, 15 lb·ft)
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