2005 YAMAHA YZ85 key

EC080000
HOW TO USE
THIS MANUAL
EC081000
PARTICULARLY IMPORTANT
INFORMATION
The Safety Alert Symbol means ATTENTION!
BECOME ALERT! YOUR SAFETY IS
INVOLVED!
Failure to follow WARNING instructions could
result in severe injury or death to the machine
operator, a bystander, or a person inspecting
or repairing the machine.
A CAUTION indicates special precautions that
must be taken to avoid damage to the
machine.
NOTE:
A NOTE provides key information to make pro-
cedures easier or clearer.
WARNING
CAUTION:
EC082000
FINDING THE REQUIRED PAGE
1. This manual consists of seven chapters;
“General information”, “Specifications”,
“Regular inspection and adjustments”,
“Engine”, “Chassis”, “Electrical” and “Tun-
ing”.
2. The table of contents is at the beginning of
the manual. Look over the general layout of
the book before finding then required chap-
ter and item.
Bend the book at its edge, as shown, to
find the required fore edge symbol mark
and go to a page for required item and
description.
5PA00010

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 equivalent oil
To the element.
NOTE:
Squeeze out the excess oil. Element should be
wet but not dripping.

4 - 39
ENG
Primary drive gear
1. Install:

Straight key 1
5PA41160
2. Install:

Primary drive gear 1

Conical washer 2

Nut (primary drive gear) 3
NOTE:
Install the conical washer to the crankshaft 4
as shown in the illustration.
5PA41170
3. Tighten:

Nut (primary drive gear) 1
Use the drive gear holder 2.
NOTE:
Hold the drive gear holder onto the crankcase
using the M6 bolts 3.
4. Install:

Primary driven gear
Refer to “CLUTCH AND PRIMARY
DRIVEN GEAR” section.
Drive gear holder:
YM-01495/90890-01495
5PA411801 23
3
T R..79 Nm (7.9 m · kg, 57 ft · lb)
5. Install:

Dowel pin 1

Gasket (right crankcase cover) 2
5PA41190
KICK SHAFT, SHIFT SHAFT AND PRIMARY DRIVE GEAR

4 - 45
ENG
EC4L0000
CDI MAGNETO
5PA41380
Extent of removal:
1 CDI magneto removal
Extent of removal Order Part name Q’ty Remarks
CDI MAGNETO REMOVAL
Preparation for removal Seat and fuel tank Refer to “SEAT, FUEL TANK AND SIDE
COVERS” section.
Disconnect the CDI magneto lead.
1 Left crankcase cover 1
2 Nut (rotor) 1 Use special tool.
Refer to “REMOVAL POINTS”.
3 Rotor 1
4 Stator 1
5Woodruff key
1
1
CDI MAGNETO

4 - 46
ENG
EC4L3000
REMOVAL POINTS
Rotor
1. Remove:

Nut (rotor) 1

Washer 2
Use the rotor holding tool 3.
Rotor holding tool:
YU-1235/90890-01235
5PA41390
2. Remove:

Rotor 1
Use the flywheel puller 2.
NOTE:
When installing the flywheel puller, turn it
counterclockwise.
Flywheel puller:
YM-1189/90890-01189
5PA41400
EC4L4000
INSPECTION
EC4L4101
CDI magneto
1. Inspect:

Rotor inner surface a

Stator outer surface b
Damage → Inspect the crankshaft runout
and crankshaft bearing.
If necessary, replace CDI magneto and/or
stator.
5PA41410
EC4L4200
Woodruff key
1. Inspect:

Woodruff key 1
Damage → Replace.
5PA41420
CDI MAGNETO

4 - 47
ENG
EC4L5000
ASSEMBLY AND INSTALLATION
CDI magneto
1. Install:

Stator 1

Screw (stator) 2
NOTE:
Temporarily tighten the screw (stator) at this
point.5PA41430
2. Install:

Woodruff key 1

Rotor 2
NOTE:

Clean the tapered portions of the crankshaft
and rotor.

When installing the woodruff key, make sure
that its flat surface a is in parallel with the
crankshaft center line b.

When installing the rotor, align the keyway c
of the rotor with the woodruff key.
5PA41440
3. Install:

Washer 1

Nut (rotor) 2
Use the rotor holding tool 3.
Rotor holding tool:
YU-1235/90890-01235
5PA41450
T R..33 Nm (3.3 m · kg, 24 ft · lb)
4. Adjust:

Ignition timing
Refer to “IGNITION TIMING CHECK” sec-
tion in the CHAPTER 3.
Ignition timing (B.T.D.C.):
0.9 mm (0.035 in)
CDI MAGNETO