2000 YAMAHA TTR125 torque

EC0A0000
CONTENTS
CHAPTER 1
GENERAL INFORMATION
DESCRIPTION
.......................................... 1-1
MACHINE IDENTIFICATION
.................... 1-2
IMPORTANT INFORMATION
................... 1-3
CHECKING OF CONNECTION
................ 1-5
SPECIAL TOOLS
...................................... 1-6
CONTROL FUNCTIONS
........................... 1-9
FUEL
....................................................... 1-12
STARTING AND BREAK-IN
................... 1-13
TORQUE-CHECK POINTS
...................... 1-15
CLEANING AND STORAGE
................... 1-16
CHAPTER 2
SPECIFICATIONS
GENERAL SPECIFICATIONS
................... 2-1
MAINTENANCE SPECIFICATIONS
......... 2-4
GENERAL TORQUE
SPECIFICATIONS
.................................. 2-17
DEFINITION OF UNITS
.......................... 2-17
CABLE ROUTING DIAGRAM
................ 2-18
CHAPTER 3
REGULAR INSPECTION AND
ADJUSTMENTS
MAINTENANCE INTERVALS
................... 3-1
PRE-OPERATION INSPECTION
AND MAINTENANCE
............................... 3-3
ENGINE
..................................................... 3-4
CHASSIS
................................................. 3-15
ELECTRICAL
.......................................... 3-25

1 - 14
GEN
INFO
STARTING AND BREAK-IN
BREAK-IN
Break-in is important to better fit the moving
and sliding parts as well as the installed parts.
It is also important to accustom the rider to the
machine better.
Avoid full-throttle run on a new machine for the
first 5 hours.
After the trial run, check for loose parts, oil
leakage and other problems.
Make full inspection and adjustment especially
of slack cables and drive chain and loose
spokes.
CAUTION:
After the break-in or before each ride, you
must check the entire machine for loose fit-
tings and fasteners as per “TORQUE-
CHECK POINTS”.
Tighten all such fasteners as required.
BREAKING IN AFTER REPLACEMENT
After a part is replaced with a new one, it is
necessary to break it in as in a new machine.
This is required especially when the following
engine-related parts are replaced.
lCylinder
lPiston
lPiston ring
lValve
lCamshaft
lCrankshaft
lClutch
lTransmission gear
lShift fork
* For warming up and inspection during
break-in, refer to “GENERAL INSPECTION
AND MAINTENANCE” and if there is any
problem, stop the engine immediately and
check.

GEN
INFO
1 - 15
TORQUE-CHECK POINTS
TORQUE-CHECK POINTS
Engine mounting
Steering Steering shaft to
handlebar
Suspension Front Steering shaft to
front fork
Rear For link type
Rear Installation of shock
absorber
Rear Installation of swing-
arm
Wheel Installation of wheel Front
Rear
Brake Front
Rear
Fuel systemFrame to engine
Frame to engine bracket
Steering shaft to frame
Steering shaft to upper bracket
Upper bracket to handlebar
Front fork to upper bracket
Front fork to lower bracket
Assembly of links
Link to frame
Link to shock absorber
Link to swingarm
Shock absorber to frame
Tightening of pivot shaft
Tightening of wheel axle
Tightening of wheel axle
Wheel to sprocket
Camshaft lever to camshaft
Camshaft lever to camshaft
Fuel tank to fuel cock
NOTE:
Concerning the tightening torque, refer to
“MAINTENANCE SPECIFICATIONS” section
in the CHAPTER 2.

SPEC

2 - 10
MAINTENANCE SPECIFICATIONS
Part to be tightened Thread size Q’tyTightening torque
Nm m•kg ft•lb
Spark plug M10
´
1.0 1 13 1.3 9.4
Cylinder head bolt M8
´
1.25 4 22 2.2 16
Cylinder head bolt M6
´
1.0 2 10 1.0 7.2
Oil pressure check bolt M6
´
1.0 1 7 0.7 5.1
Cylinder head side cover M6
´
1.0 2 10 1.0 7.2
Tappet cover M45
´
1.5 2 18 1.8 13
Timing chain guide M6
´
1.0 1 10 1.0 7.2
Adjusting screw (valve) and locknut M5
´
0.5 2 8 0.8 5.8
Camshaft sprocket M8
´
1.25 1 20 2.0 14
Bearing plate cover (camshaft) M6
´
1.0 1 10 1.0 7.2
Timing chain tensioner cap bolt M8
´
1.25 1 8 0.8 5.8
Timing chain tensioner M6
´
1.0 2 10 1.0 7.2
Oil pump assembly M6
´
1.0 2 7 0.7 5.1
Oil pump cover M5
´
0.8 1 5 0.5 3.6
Engine oil drain bolt M12
´
1.5 1 20 2.0 14
Carburetor joint M6
´
1.0 2 10 1.0 7.2
Carburetor joint clamp (air filter) M4
´
0.7 1 2 0.2 1.4
Coasting enricher cover M4
´
0.7 2 2 0.2 1.4
Air filter case M6
´
1.0 3 7 0.7 5.1
Muffler M6
´
1.0 2 10 1.0 7.2
Muffler M10
´
1.25 1 60 6.0 43
Muffler guard M6
´
1.0 7 10 1.0 7.2
Spark arrester M6
´
1.0 3 10 1.0 7.2
Crankcase M6
´
1.0 10 10 1.0 7.2
Left crankcase cover M6
´
1.0 7 10 1.0 7.2
Drive sprocket cover M6
´
1.0 2 12 1.2 8.7
Right crankcase cover M6
´
1.0 9 10 1.0 7.2
Lead guide (CDI magneto lead) M6
´
1.0 1 7 0.7 5.1
Timing mark accessing screw M14
´
1.5 1 7 0.7 5.1
Crankshaft end accessing screw M32
´
1.5 1 7 0.7 5.1
Kickstarter crank M12
´
1.0 1 50 5.0 36
Primary drive gear M12
´
1.0 1 70 7.0 50
Clutch spring M5
´
0.8 4 6 0.6 4.3
Clutch boss M12
´
1.0 1 60 6.0 43
Adjusting screw (push rod) and locknut M6
´
1.0 1 8 0.8 5.8
Bearing plate cover (main axle) M6
´
1.0 2 7 0.7 5.1
Drive sprocket M5
´
0.8 2 6 0.6 4.3
Shift arm M6
´
1.0 1 10 1.0 7.2
Shift rod and shift pedal M6
´
1.0 1 7 0.7 5.1
Shift rod and shift arm M6
´
1.0 1 7 0.7 5.1
Shift pedal M6
´
1.0 1 12 1.2 8.7
Segment M6
´
1.0 1 12 1.2 8.7
Stopper lever M6
´
1.0 1 10 1.0 7.2

SPEC
2 - 14
MAINTENANCE SPECIFICATIONS
NOTE:
1. First, tighten the ring nut approximately 38 Nm (3.8 m • kg, 27 ft • lb) by using the ring nut
wrench and turn the steering right and left a few times; then loosen the ring nut one turn.
2. Retighten the ring nut 20 Nm (2.0 m • kg, 14 ft • lb).Part to be tightened Thread size Q’tyTightening torque
Nm m•kg ft•lb
Upper bracket and inner tube M8 ´ 1.25 2 25 2.5 18
Lower bracket and inner tube M10 ´ 1.25 2 60 6.0 43
Upper bracket and steering stem M22 ´ 1.0 1 110 11.0 80
Handlebar upper holder and upper bracket M8 ´ 1.25 4 14 1.4 10
Steering stem and ring nut M25 ´ 1.0 1 Refer to NOTE.
Front fork and cap bolt M25 ´ 1.0 2 23 2.3 17
Front fork and damper rod M10 ´ 1.0 2 23 2.3 17
Front fork and cable guide M6 ´ 1.0 1 7 0.7 5.1
Number plate M6 ´ 1.0 1 7 0.7 5.1
Starter knob M11 ´ 1.25 1 1 0.1 0.7
Starter knob stay M6 ´ 1.0 2 10 1.0 7.2
Grip cap upper and lower M5 ´ 0.8 2 4 0.4 2.9
Throttle cable cap M4 ´ 0.7 2 2 0.2 1.4
Brake lever mounting (bolt) M6 ´ 1.0 1 7 0.7 5.1
Brake lever mounting (nut) M6 ´ 1.0 1 7 0.7 5.1
Brake lever holder M5 ´ 0.8 2 4 0.4 2.9
Clutch lever mounting (bolt) M6 ´ 1.0 1 7 0.7 5.1
Clutch lever mounting (nut) M6 ´ 1.0 1 7 0.7 5.1
Clutch lever holder M5 ´ 0.8 2 4 0.4 2.9
Front wheel axle and axle nut M12 ´ 1.25 1 45 4.5 32
Front brake camshaft lever and camshaft M6 ´ 1.0 1 10 1.0 7.2
Rear wheel axle and axle nutM12 ´ 1.25 1 60 6.0 43
Rear brake camshaft lever and camshaft M6 ´ 1.0 1 10 1.0 7.2
Brake pedal mounting M10 ´ 1.25 1 30 3.0 22
Brake pedal position locknut M6 ´ 1.0 1 7 0.7 5.1
Front wheel nipple (spoke) — 36 2 0.2 1.4
Rear wheel nipple (spoke) — 36 3 0.3 2.2
Driven sprocket and wheel hub M8 ´ 1.25 4 26 2.6 19
Sidestand mounting (nut) M10 ´ 1.25 1 43 4.3 31
Engine mounting:
Engine bracket (front) and frame M8 ´ 1.25 2 40 4.0 29
Engine bracket (front) and engine M8 ´ 1.25 2 40 4.0 29
Engine bracket (upper) and frame M8 ´ 1.25 2 40 4.0 29
Engine bracket (upper) and cylinder head M8 ´ 1.25 1 40 4.0 29
Engine and frame (rear) M8 ´ 1.25 2 40 4.0 29
Pivot shaft and nut M12 ´ 1.25 1 53 5.3 38
Relay arm and swingarm M12 ´ 1.25 1 53 5.3 38

SPEC
2 - 15
MAINTENANCE SPECIFICATIONS
NOTE:
- marked portion shall be checked for torque tightening after break-in or before each ride.Part to be tightened Thread size Q’tyTightening torque
Nm m•kg ft•lb
Relay arm and connecting arm M10 ´ 1.25 1 35 3.5 25
Connecting arm and frame M10 ´ 1.25 1 35 3.5 25
Rear shock absorber assembly and frameM12 ´ 1.25 1 53 5.3 38
Rear shock absorber assembly and relay arm M10 ´ 1.25 1 35 3.5 25
Rear shock absorber and locknut (preload) M46 ´ 1.5 1 42 4.2 30
Drive chain tensioner (upper) M8 ´ 1.25 1 23 2.3 17
Drive chain tensioner (lower) M6 ´ 1.0 1 7 0.7 5.1
Drive chain support and swingarm M6 ´ 1.0 2 7 0.7 5.1
Drive chain guide and swingarm M6 ´ 1.0 2 7 0.7 5.1
Drive chain guard mounting M6 ´ 1.0 2 7 0.7 5.1
Fuel tank mounting M6 ´ 1.0 2 10 1.0 7.2
Fuel tank and fuel cock M6 ´ 1.0 2 7 0.7 5.1
Fuel tank and fuel tank bracket M6 ´ 1.0 4 7 0.7 5.1
Front fender mounting M6 ´ 1.0 4 7 0.7 5.1
Rear fender mounting M6 ´ 1.0 4 7 0.7 5.1
Flap guard mounting M6 ´ 1.0 2 7 0.7 5.1
Left side cover mounting M6 ´ 1.0 2 7 0.7 5.1
Seat mounting M6 ´ 1.0 2 7 0.7 5.1

SPEC
2 - 16
MAINTENANCE SPECIFICATIONS
EC212300
ELECTRICAL
Item Standard Limit
CDI:
Magneto-model/manufacturer 5HP-00/YAMAHA ----
Charging coil resistance (color) 688 ~ 1,032 W at 20 ˚C (68 ˚F)
(Green-Brown)----
Pickup coil resistance (color) 248 ~ 372 W at 20 ˚C (68 ˚F)
(White/Red)----
CDI unit-model/manufacturer 5HP-00/YAMAHA ----
Ignition coil:
Model/manufacturer 4KJ-10/YAMAHA ----
Minimum spark gap 6 mm (0.24 in) ----
Primary coil resistance 0.18 ~ 0.28 W at 20 ˚C (68 ˚F) ----
Secondary coil resistance 6.3 ~ 9.5 kW at 20 ˚C (68 ˚F) ----
Part to be tightened Thread size Q’tyTightening torque
Nm m•kg ft•lb
Pickup coil M6 ´ 1.0 2 10 1.0 7.2
Blind plug (neutral switch) M10 ´ 1.25 1 20 2.0 14
Stator M6 ´ 1.0 3 10 1.0 7.2
RotorM12 ´ 1.25 1 80 8.0 58
Ignition coil M6 ´ 1.0 2 7 0.7 5.1

2 - 17
SPEC

GENERAL TORQUE SPECIFICATIONS/
DEFINITION OF UNITS
EC220001
GENERAL TORQUE SPECIFICATIONS
This chart specifies torque for standard fasten-
ers with standard I.S.O. pitch threads. Torque
specifications for special components or
assemblies are included in the applicable sec-
tions of this book. To avoid warpage, tighten
multi-fastener assemblies in a crisscross fash-
ion, in progressive stages, until full torque is
reached. Unless otherwise specified, torque
specifications call for clean, dry threads. Com-
ponents should be at room temperature.
A
(Nut)B
(Bolt)TORQUE
SPECIFICATION
Nm m•kg ft•lb
10 mm
12 mm
14 mm
17 mm
19 mm
22 mm6 mm
8 mm
10 mm
12 mm
14 mm
16 mm6
15
30
55
85
1300.6
1.5
3.0
5.5
8.5
134.3
11
22
40
61
94
A: Distance between flats
B: Outside thread diameter
EC230000
DEFINITION OF UNITS
Unit Read Definition Measure
mm
cmmillimeter
centimeter10
-3

meter
10
-2

meterLength
Length
kg kilogram 10
3

gram Weight
N Newton 1 kg
´
m/sec
2

Force
Nm
m • kgNewton meter
Meter kilogramN
´
m
m
´
kgTorque
Torque
Pa Pascal N/m
2

Pressure
N/mm Newton per millimeter N/mm Spring rate
L
cm
3

Liter
Cubic centimeter—
—Volume or capacity
Volume or capacity
r/min Revolution per minute — Engine speed