Yamaha YZ125 2009 Owner's Service Manual page 63

Never run the engine without the air filter el-
ement in place; this would allow dirt and
dust to enter the engine and cause rapid
wear and possible engine damage.
1. Remove:
• Seat
• Fitting bolt "1"
• Washer "2"
• Air filter element "3"
• Air filter guide "4"
2. Clean:
• Air filter element
Clean them with solvent.
After cleaning, remove the remaining solvent
by squeezing the element.
• Do not twist the element when squeezing
the element.
• Leaving too much of solvent in the ele-
ment may result in poor starting.
3. Inspect:
• Air filter element
Damage → Replace.
4. Apply:
• Foam-air-filter oil or equivalent oil to the ele-
ment
Squeeze out the excess oil. Element should be
wet but not dripping.
5. Install:
• Air filter guide "1"
Align the projection "a" on filter guide with the
hole "b" in air filter element.
6. Apply:
• Lithium soap base grease
On the matching surface "a" on air filter ele-
ment.
7. Install:
• Air filter element "1"
• Washer
• Fitting bolt
Fitting bolt:
2 Nm (0.2 m•kg, 1.4 ft•lb)
Align the projection "a" on filter guide with the
hole "b" in air filter case.
3-10
ENGINE