maintenance YAMAHA YZ85 2003 Owner's Manual

3 - 11
INSP
ADJ
AIR FILTER CLEANING
AIR FILTER CLEANING
NOTE:
Proper air filter maintenance is the biggest key
to preventing premature engine wear and
damage.
CAUTION:
Never run the engine without the air filter
element 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
5PA30150
2. Clean:

Air filter element
Clean them with solvent.
NOTE:
After cleaning, remove the remaining solvent
by squeezing the element.
CAUTION:

Do not twist the element when squeezing
the element.

Leaving too much of solvent in the ele-
ment may result in poor starting.
5PA30160
3. Inspect:

Air filter element
Damage → Replace.
4. Apply:

Foam-air-filter oil or engine mixing oil
To the element.
NOTE:
Squeeze out the excess oil. Element should be
wet but not dripping.

5 - 54
CHAS
Relay arm
1. Inspect:

Bearing 1

Bearing (polylube bearing) 2

Bushing 3
Free play exists/unsmooth revolution/rust
→ Replace bearing and bushing as a set.
2. Inspect:

Bearing (polylube bearing) 2
Loss of solid lubrication → Replace.

Oil seal 4
Damage → Replace.
NOTE:
Polylube bearings, with solid lubrication, have
been adopted with the intent to make the nee-
dle bearings, used in this model, maintenance
free. With polylube bearings, no grease nipple
and regular lubrication is necessary. However,
grease should be applied to all oil seals and
collars when removed or installed.
Connecting rod
1. Inspect:

Bearing 1

Bushing 2
Free play exists/unsmooth revolution/rust
→ Replace bearing and bushing as a set.
2. Inspect:

Oil seal 3
Damage → Replace.
5PAR0023
5PA51700
EC575000
ASSEMBLY AND INSTALLATION
Bearing, bushing and oil seal
1. Install:

Bearing 1

Bushing (swingarm) 2

Oil seal 3
To swingarm.
NOTE:

Apply the molybdenum disulfide grease on
the bearing and bushing when installing.

Install the bearing by pressing it on the side
having the manufacture’s marks or numbers.

First install the bushing and then the bearing
to a specified depth from inside.
Installed depth of bearings and
bushings:
Bearing a: 4.5 mm (0.18 in)
Bushing b: 4.5 mm (0.18 in)
5PA51730
5PA51740
SWINGARM