Checking The Throttle Body Joint; Checking The Breather Hoses; Checking The Exhaust System - Yamaha WR450F Owner's Service Manual

NOTICE
Do not twist the element when squeezing
the element.
4. Check:
• Air filter element
Damage  Replace.
5. Yamaha foam air filter oil or other quality
foam air filter oil.
Oil application quantify
50 g
TIP
Squeeze out the excess oil. Element should be
wet but not dripping.
6. Install:
• Air filter guide "1" (to the air filter element)
• Air filter element "2"
• Air filter mounting bolt "3"
Air filter mounting bolt
2.0 Nm (0.20 m·kgf, 1.4 ft·lbf)
7. Install:
• Air filter case cover "1"
TIP
Align the air filter case cover groove "a" with the
air filter case edge "b".
1
3
2
8. Install:
• Fuel tank cap cover

CHECKING THE THROTTLE BODY JOINT

EAS2GC1092
1. Check:
• Throttle body joint
Refer to "CHECKING THE THROTTLE
BODY JOINT" on page 8-10.

CHECKING THE BREATHER HOSES

EAS2GC1093
1. Check:
• Breather hose "1"
Crack/damage  Replace.
Loose connection  Connect properly.
ECA
NOTICE
Make sure the cylinder head breather hose
is routed correctly.
EAS2GC1094

CHECKING THE EXHAUST SYSTEM

1. Remove:
• Exhaust pipe protector
2. Check:
• Exhaust pipe 1
• Exhaust pipe 2
• Silencer
Crack/damage  Replace.
Refer to "ENGINE REMOVAL" on page 6-1.
• Exhaust gas
Leaks  Replace the gasket.
Refer to "ENGINE REMOVAL" on page 6-1.
3-15
ENGINE
1
a
b
1