relay YAMAHA TTR125 2003 User Guide

5 - 56
CHASSWINGARM
REMOVAL POINTS
Bushing
1. Remove:
Bushing 1
NOTE:
Remove the bushing by pressing.
INSPECTION
Wash the bushings, collars, and covers in a
solvent.
Swingarm
1. Inspect:
Bushing 1
Bushing 2
Damage/pitting → Replace bushings as
a set.
2. Inspect:
Dust cover
Damage → Replace.
3. Inspect:
Swingarm
Damage/bends/cracks → Replace.
Relay arm
1. Inspect:
Collar 1
Bushing 2
Damage/pitting → Replace collar and
bushing as a set.
Bushing 3
Bushing 4
Damage/pitting → Replace bushings as
a set.
Collar 5
Bushing 6
Bushing 7
Damage/pitting → Replace collars and
bushing as a set.
2. Inspect:
Oil seal 8
Dust cover 9
Damage → Replace.
3. Inspect:
Relay arm 0
Damage/bends/cracks → Replace.

5 - 57
CHAS
Connecting arm
1. Inspect:
Collar 1
Bushing 2
Damage/pitting → Replace collar and
bushings as a set.
2. Inspect:
Dust cover 3
Damage → Replace.
3. Inspect:
Connecting arm 4
Damage/bends/cracks → Replace.
EC575000
ASSEMBLY AND INSTALLATION
Bushing
1. Install:
Bushing
NOTE:
Make sure to press in the bushing so that they
are flush with the surface of the connecting
arm and relay arm.
Swingarm assembly
1. Install:
Bushing 1
Dust covers 2
On swingarm.
NOTE:
Apply the molybdenum disulfide grease on the
bushing and dust cover lip.
SWINGARM

5 - 58
CHAS
2. Install:
Oil seals 1
Collars 2
Bushing 3
Dust covers 4
Dust covers 5
Rubber boot 6
On relay arm.
NOTE:
Apply the molybdenum disulfide grease on the
bushing, collar, oil seal lip and dust cover lip.
3. Install:
Collar 1
Dust covers 2
On connecting arm.
NOTE:
Apply the molybdenum disulfide grease on the
collar and dust cover lip.
4. Install:
Relay arm 1
Bolt (relay arm)
Plain washer
Nut (relay arm)
TT-R125E
TT-R125LWE
On swingarm.
NOTE:
Apply the molybdenum disulfide grease on the
bolt (relay arm).
T R..70 Nm (7.0 m · kg, 50 ft · lb)
T R..53 Nm (5.3 m · kg, 38 ft · lb)
SWINGARM

5 - 59
CHASSWINGARM
5. Install:
Connecting arm 1
Bolt (connecting arm)
Plain washer
Nut (connecting arm)
On relay arm.
NOTE:
Apply the molybdenum disulfide grease on the
bolt (connecting arm).
6. Install:
Drive chain guide 1
Collars
Bolts (drive chain guide) 2
T R..35 Nm (3.5 m · kg, 25 ft · lb)
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)
7. Install:
Drive chain support 1
Collars
Bolts (drive chain support) 2
Drive chain guard 3
Bolts (drive chain guide) 4
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)LT
Installation
1. Install:
Swingarm
Pivot shaft 1
Plain washer
Nut (pivot shaft)
NOTE:
Apply the molybdenum disulfide grease on the
pivot shaft.
2. Check:
Swingarm side play a
Free play exists → Replace bushing.
Swingarm up and down movement b
Unsmooth movement/binding/rough
spots → Grease or replace bushing.
T R..53 Nm (5.3 m · kg, 38 ft · lb)

5 - 60
CHAS
3. Install:
Bolt (rear shock absorber - relay arm) 1
Plain washer
Nut (rear shock absorber-relay arm)
NOTE:
Apply the molybdenum disulfide grease on the
bolt (rear shock absorber - relay arm).
T R..35 Nm (3.5 m · kg, 25 ft · lb)
4. Install:
Bolt (connecting arm-frame) 1
Plain washer
Nut (connecting arm-frame)
NOTE:
Apply the molybdenum disulfide grease on the
bolt (connecting arm - frame).
T R..35 Nm (3.5 m · kg, 25 ft · lb)
5. Install:
Drive chain tensioner (lower) 1
Collar
Bolt [drive chain tensioner (lower)]
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)
6. Install:
Bushing 1
Drive chain tensioner (upper) 2
Plain washer 3
Bolt [drive chain tensioner (upper)] 4
NOTE:
Apply the lithium soap base grease on the
bushing inner surface.
T R..23 Nm (2.3m · kg, 17 ft · lb)
SWINGARM

5 - 61
CHASREAR SHOCK ABSORBER ASSEMBLY
EC580000
REAR SHOCK ABSORBER ASSEMBLY
Extent of removal:1 Rear shock absorber assembly removal
Extent of removal Order Part name Q’ty Remarks
Preparation for removalREAR SHOCK ABSORBER
ASSEMBLY REMOVAL
Hold the machine by placing the
suitable stand under the engine.
WARNING
Support the machine securely so there is nodanger of it falling over.
Seat and side covers Refer to “SEAT, FUEL TANK AND SIDE
COVERS” section in the CHAPTER 4.
1 Bolt (rear shock absorber assem-
bly-relay arm)1 Hold the swingarm.
2 Bolt (rear shock absorber assem-
bly-frame)1
3 Bushing 1 Refer to “REMOVAL POINTS”.
4 Rear shock absorber assembly 1
1

5 - 64
CHAS
EC585000
ASSEMBLY AND INSTALLATION
Bushing
1. Install:
Bushing 1
NOTE:
Install the bushing by pressing.
Installation
1. Install:
Rear shock absorber assembly
On frame.
NOTE:
Install the rear shock absorber assembly with
its warning label a facing left side of the
machine (for TT-R125E).
2. Install:
Bolt (rear shock absorber assembly -
frame)
Plain washer 1
Nut (rear shock absorber assembly -
frame) 2
NOTE:
Apply the molybdenum disulfide grease on the
bolt (rear shock absorber assembly - frame).
T R..53 Nm (5.3 m · kg, 38 ft · lb)
3. Install:
Bolt (rear shock absorber assembly -
relay arm)
Plain washer 1
Nut (rear shock absorber assembly -
relay arm) 2
NOTE:
Apply the molybdenum disulfide grease on the
bolt (rear shock absorber assembly - relay
arm).
T R..35 Nm (3.5 m · kg, 25 ft · lb)
REAR SHOCK ABSORBER ASSEMBLY

6 - 1
–+ELEC

* The illustration shows the TT-R125LWE
12345 7 6890A
EDCB

ELECTRICAL COMPONENTS AND WIRING DIAGRAM
EC600000
ELECTRICAL
EC610000
ELECTRICAL COMPONENTS AND WIRING DIAGRAM
EC611000
ELECTRICAL COMPONENTS
1
CDI unit
2
Main switch
3
Start switch
4
Clutch switch
5
Engine stop switch
6
Starting circuit cut-off
relay
7
Ignition coil
8
Battery
9
Starter relay
0
Fuse
A
Rectifier/regulator
B
Neutral switch
C
CDI magneto
D
Starter motor
E
Spark plug
COLOR CODE
B ...................... Black
Br ..................... Brown
G...................... Green
O...................... Orange
R ...................... Red
Sb .................... Sky blueW ..................... White
Y ...................... Yellow
B/W.................. Black/White
L/Y ................... Blue/Yellow
R/W ................. Red/White
EC612000
WIRING DIAGRAM
B
R/W
WB
RYW
BR Y
10A
R
BR/W
ON
OFFR
BrRB/WBB/WBr B
ON OFF
R/WBr BB
R/WSbR/W
BB BL/Y
OFF RUN
BBBB/W
W
YWSbBSbY B
G
WBrRG
WBrRB
B/WR
W Br
GO
R
SbR/WR/WR/WR/W
R/W
B
R
B/WBrBr
B
L/Y
BSb
YW
RWBrG
RWBrG
B/W
B/W
BOO
B
B
1
2
3
45 67
8
90 A
BC
DE

6 - 6
–+ELEC
ELECTRIC STARTING SYSTEM
STARTING CIRCUIT CUT-OFF SYSTEM
OPERATION
If the main switch is set to “ON”, the starter
motor can only operate if at least one of the
following conditions is met:
The transmission is in neutral (the neutral
switch is closed).
The clutch lever is pulled to the handlebar
(the clutch switch is closed).
The starting circuit cut-off relay prevents the
starter motor from operating when neither of
these conditions has been met. In this
instance, the starting circuit cut-off relay is
open so current cannot reach the starter
motor. When at least one of the above condi-
tions has been met the starting circuit cut-off
relay is closed and the engine can be started
by pressing the start switch.
WHEN THE TRANSMISSION IS
IN NEUTRAL
WHEN THE CLUTCH LEVER IS
PULLED TO THE HANDLEBAR
1Battery
2Main fuse
3Main switch
4Start switch
5Starting circuit cut-off relay
6Neutral switch
7Clutch switch
8Starter relay
9Starter motor
12
M
3
8
54
6 9
7
ELECTRIC STARTING SYSTEM

–+ELEC
6 - 7
INSPECTION STEPS
If the starter motor will not operate, use the following inspection steps.
*1 marked: Refer to “FUSE INSPECTION” section in the CHAPTER 3.
*2 marked: Refer to “BATTERY INSPECTION AND CHARGING” section in the CHAPTER 3.
*3 marked: Refer to “MAIN SWITCH INSPECTION” section.
NOTE:
Remove the following parts before inspection.
1) Seat
2) Rear fender
3) Fuel tank
Use 12 V battery in this inspection.
Use the following special tools in this inspection.
Pocket tester:
YU-3112-C/90890-03112
*1 Check fuseReplace fuse and
check wire harness.
*2 Check battery Recharge or replace.
Check each coupler and
wire connection.Repair or replace.
*3 Check main switch. Replace.
Check starter motor
operation.Repair or replace.
Check starting circuit
cut-off relay.Replace.
Check starter relay. Replace.
Check neutral switch. Replace.
Check clutch switch. Replace.
Check start switch. Replace.
OK
OK
OK
OK
OK
OK
OK
OK
OK
No good
No good
No good
No good
No good
No good
No good
No good
No good
No good
ELECTRIC STARTING SYSTEM