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

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.
ECA14920
NOTICE
Make sure the cylinder head breather hose is
routed correctly.
PERIODIC MAINTENANCE
1
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)
3-10