Checking The Throttle Body Joint And Air Filter Case Joint; Checking The Fuel Line; Checking The Cylinder Head Breather Hose - Yamaha YZF-R125 Service Manual

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ECA5D71025
CAUTION:
Never operate the engine without the air filter
element installed. Unfiltered air will cause
rapid wear of engine parts and may damage
the engine. Operating the engine without the
air filter element will also affect throttle body
tuning, leading to poor engine performance
and possible overheating.
NOTE:
Make sure the air filter element is properly in-
stalled in the air filter case.
7. Install:
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
• Rider seat
Refer to "GENERAL CHASSIS" on page 4-1.
EAS5D71007
CHECKING THE THROTTLE BODY JOINT
AND AIR FILTER CASE JOINT
1. Remove:
• Right lower side cowling
• Left lower side cowling
Refer to "GENERAL CHASSIS" on page 4-1.
2. Check:
• Throttle body joint "1"
• Air filter case joint "2"
Cracks/damage → Replace.
2
3. Install:
• Right lower side cowling
• Left lower side cowling
Refer to "GENERAL CHASSIS" on page 4-1.
EAS21030

CHECKING THE FUEL LINE

1. Remove:
• Left side panel
Refer to "GENERAL CHASSIS" on page 4-1.
2. Lift the fuel tank. (Do not disconnect the fuel
hose, drain hose, and couplers.)
3. Check:
• Fuel hose "1"
Cracks/damage → Replace.
Loose connection → Connect properly.
4. Install:
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
• Left side panel
Refer to "GENERAL CHASSIS" on page 4-1.
EAS21050
CHECKING THE CYLINDER HEAD
BREATHER HOSE
1. Remove:
• Left side panel
Refer to "GENERAL CHASSIS" on page 4-1.
2. Check:
• Cylinder head breather hose "1"
Cracks/damage → Replace.
Loose connection → Connect properly.
ECA14920
CAUTION:
Make sure the cylinder head breather hose is
1
routed correctly.
3. Install:
• Left side panel
Refer to "GENERAL CHASSIS" on page 4-1.
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ENGINE