key YAMAHA TTR125 2002 Owners Manual

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.
FINDING THE REQUIRED PAGE
1. This manual consists of six chapters;
“General Information”, “Specifications”,
“Regular inspection and adjustments”,
“Engine”, “Chassis” and “Electrical”.
2. The table of contents is at the beginning
of the manual. Look over the general lay-
out of the book before finding then
required chapter 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.
WARNING
CAUTION:

3 - 5
INSP
ADJ

THROTTLE LUBRICATION/AIR FILTER CLEANING
THROTTLE LUBRICATION
1. Remove:
l
Throttle cable cap
1

NOTE:

Before adjusting the throttle cable free play,
the engine idle speed should be adjusted.
WARNING

After adjusting, turn the handlebar to
right and left and make sure that the
engine idling does not run faster.
2. Apply:
l
Lithium soap base grease
On the throttle cable end
a
and tube
guide cable winding portion
b
.
3. Install:
l
Throttle cable cap
T R..2 Nm (0.2 m · kg, 1.4 ft · lb)

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.

4 - 41
ENGCLUTCH AND PRIMARY DRIVEN GEAR
EC498100
PRIMARY DRIVEN GEAR
Extent of removal:1 Primary driven gear removal2 Primary drive gear removal
Extent of removal Order Part name Q’ty Remarks
PRIMARY DRIVEN GEAR
REMOVAL
1 Nut (clutch boss) 1
Use special tool.
Refer to “REMOVAL POINTS”. 2 Lock washer 1
3 Clutch boss 1
4 Thrust plate 1
5 Primary driven gear 1
6 Thrust plate 1
7 Conical spring washer 1
8 Nut (primary drive gear) 1
Refer to “REMOVAL POINTS”.
9 Primary drive gear 1
10Straight key
1
2
1

4 - 45
ENGCLUTCH AND PRIMARY DRIVEN GEAR
Push rod
1. Inspect:
lPush rod 1 1
lBall 2
Wear/damage/bend ® Replace.
Primary drive gear
1. Inspect:
lPrimary drive gear
Wear/damage ® Replace.
EC495000
ASSEMBLY AND INSTALLATION
Push lever
1. Install:
lPush lever 1
NOTE:
lApply the lithium soap base grease on the oil
seal lip.
lApply the engine oil on the push lever.
Primary drive gear
1. Install:
lStraight key
lPrimary drive gear 1
lWasher 2
lNut (primary drive gear) 3
lPrimary driven gear 4
NOTE:
lInstall the primary drive gear with the stamp
a facing out.
lPlace a folded rag or aluminum plate 5
between the teeth of the primary drive gear
and primary driven gear.
T R..70 Nm (7.0 m · kg, 50 ft · lb)

4 - 58
ENGCDI MAGNETO
EC4L0000
CDI MAGNETO
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 “SAET, FUEL TANK AND SIDE
COVERS” section.
Drain the engine oil Refer to “ENGINE OIL REPLACEMENT”
section in the CHAPTER 3.
Drive sprocket cover Refer to “ENGINE REMOVAL” section.
1 CDI magneto lead 1
2 Left crankcase cover 1
3 Nut (rotor) 1
Use special tool.
Refer to “REMOVAL POINTS”.
4 Rotor 1
5 Woodruff key 1
6 Pickup coil 1
7 Lead guide 1
8Stator
1
1

4 - 59
ENGCDI MAGNETO
REMOVAL POINTS
Rotor
1. Remove:
lNut (rotor) 1
lPlain washer 2
Use the sheave holder 3.
Sheave holder:
YS-1880-A/90890-01701
2. Remove:
lRotor 1
Use the flywheel puller 2.
Flywheel puller:
YU-33270-B/90890-01362
EC4L4000
INSPECTION
EC4L4101
CDI magneto
1. Inspect:
lRotor inner surface a
lStator outer surface b
Damage ® Inspect the crankshaft
runout and crankshaft bearing.
If necessary, replace CDI magneto and/
or stator.
EC4L4200
Woodruff key
1. Inspect:
lWoodruff key 1
Damage ® Replace.
EC4L5000
ASSEMBLY AND INSTALLATION
CDI magneto
1. Install:
lStator 1
lBolt (stator)
lLead guide
lScrew (lead guide) 2
lPickup coil 3
lBolt (pickup coil)
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)LT
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)LT
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)LT

4 - 60
ENGCDI MAGNETO
2. Install:
lWoodruff key 1
lRotor 2
NOTE:
lClean the tapered portions of the crankshaft
and rotor.
lWhen installing the woodruff key, make sure
that its flat surface a is in parallel with the
crankshaft center line b.
lWhen installing the rotor, align the keyway of
the rotor with the woodruff key.
3. Install:
lPlain washer 1
lNut (rotor) 2
Use the sheave holder 3.
Sheave holder:
YS-1880-A/90890-01701
T R..80 Nm (8.0 m · kg, 58 ft · lb)
4. Install:
lDowel pin
lGasket
lLeft crankcase cover
lBolt (left crankcase cover)
NOTE:
Tighten the screws in stage, using a crisscross
pattern.
New
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
5. Connect:
lCDI magneto lead
Refer to “CABLE ROUTING DIA-
GRAM” section in the CHAPTER 2.