2001 YAMAHA YZ125LC torque

EC0A0000
CONTENTS
CHAPTER 1
GENERAL INFORMATION
DESCRIPTION............................................1-1
MACHINE IDENTIFICATION......................1-2
IMPORTANT INFORMATION.....................1-3
CHECKING OF CONNECTION..................1-6
SPECIAL TOOLS........................................1-7
CONTROL FUNCTIONS.............................1-9
FUEL AND ENGINE MIXING OIL.............1-12
STARTING AND BREAK-IN.....................1-13
TORQUE-CHECK POINTS.......................1-16
CLEANING AND STORAGE....................1-17
CHAPTER 2
SPECIFICATIONS
GENERAL SPECIFICATIONS....................2-1
MAINTENANCE SPECIFICATIONS...........2-3
GENERAL TORQUE SPECIFICATIONS..2-12
DEFINITION OF UNITS............................2-12
CABLE ROUTING DIAGRAM..................2-13
CHAPTER 3
REGULAR INSPECTION
AND ADJUSTMENTS
MAINTENANCE INTERVALS.....................3-1
PRE-OPERATION INSPECTION AND
MAINTENANCE..........................................3-4
ENGINE.......................................................3-5
CHASSIS...................................................3-17
ELECTRICAL............................................3-38
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1-15
GEN
INFO
STARTING AND BREAK-IN
cC
9After the break-in or before each race, you
must check the entire machine for loose fit-
tings and fasteners as per “TORQUE-
CHECK POINTS”.
Tighten all such fasteners as required.
9When any of the following parts have been
replaced, they must be broken in.
CYLINDER AND CRANKSHAFT:
About one hour of break-in operation is
necessary.
PISTON, RING AND GEARS:
These parts require about 30 minutes of
break-in operation at half-throttle or less.
Observe the condition of the engine careful-
ly during operation.
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1-16
GEN
INFO
TORQUE-CHECK POINTS
EC1A0012
TORQUE-CHECK POINTS
Frame construction Frame to rear frame
Combined seat and tank Fuel tank to frame
Engine mounting Frame to engine
Steering Steering shaft to Steering shaft to frame
handlebar Steering shaft to handle crown
Handle crown to handlebar
Suspension Front Steering shaft to Front fork to handle crown
front fork Front fork to under bracket
Rear For link type Assembly of links
Link to frame
Link to shock absorber
Link to swingarm
Rear Installation of shock Shock absorber to frame
absorber
Rear Installation of swingarm Tightening of pivot shaft
Wheel Installation of wheel Front Tightening of front axle
Tightening of axle holder
Rear Tightening of rear axle
Wheel to sprocket
Brake Front Caliper to front fork
Brake disc to wheel
Tightening of union bolt
Master cylinder to handlebar
Tightening of air bleeder
Rear Brake disc to wheel
Tightening of union bolt
Master cylinder to frame
Tightening of air bleeder
Fuel system Fuel tank to fuel cock
NOTE:
Concerning the tightening torque, refer to “
MAINTENANCE SPECIFICATIONS” section in
the CHAPTER 2.
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2-5
SPECMAINTENANCE SPECIFICATIONS
Part to be tightened Thread size Q'tyT ightening torqueNm m•kg ft•lb
Spark plug M14 ´1.25 1 20 2.0 14
Cylinder head (nut) M 8 ´1.25 5 28 2.8 20
(stud) M 8 ´1.25 5 13 1.3 9.4
Cylinder (nut) M 8 ´1.25 4 30 3.0 22
(stud) M10 ´1.25 4 13 1.3 9.4
Power valve:
Cover M 5 ´0.8 4 4 0.4 2.9
Link lever M 4 ´0.7 1 4 0.4 2.9
Holder (power valve) M 5 ´0.8 4 8 0.8 5.8
Push rod M 5 ´0.8 1 5 0.5 3.6
Thrust plate M 5 ´0.8 1 4 0.4 2.9
Governor fork M 4 ´0.7 2 5 0.5 3.6
Housing M 5 ´0.8 4 5 0.5 3.6
Impeller M 8 ´1.25 1 14 1.4 10
Water pump housing cover M 6 ´1.0 4 10 1.0 7.2
Coolant drain bolt M 6 ´1.0 1 10 1.0 7.2
Radiator hose clamp M 6 ´1.0 8 1 0.1 0.7
Air filter element M 6 ´1.0 1 2 0.2 1.4
Carburetor joint M 6 ´1.0 4 10 1.0 7.2
Air filter case M 6 ´1.0 2 4 0.4 2.9
Air filter joint M 5 ´0.8 5 1 0.1 0.7
Read valve M 3 ´0.5 6 1 0.1 0.7
Crankcase M 6 ´1.0 12 14 1.4 10
Crankcase cover (right) M 6 ´1.0 8 10 1.0 7.2
Crankcase cover (left) M 6 ´1.0 5 5 0.5 3.6
Chain cover M 6 ´1.0 2 5 0.5 3.6
Bearing plate cover M 6 ´1.0 3 10 1.0 7.2
Holder M 6 ´1.0 1 10 1.0 7.2
Oil check bolt M 6 ´1.0 1 10 1.0 7.2
Oil drain bolt M12 ´1.5 1 20 2.0 14
Kick starter M 6 ´1.0 1 10 1.0 7.2
Cluch cover M 6 ´1.0 6 10 1.0 7.2
Primary drive gear M10 ´1.25 1 55 5.5 40
Clutch boss M16 ´1.0 1 80 8.0 58
Clutch spring M 6 ´1.0 5 10 1.0 7.2
Push lever axle M 6 ´1.0 1 7 0.7 5.1
Drive sprocket M16 ´1.0 1 60 6.0 43
Shift pedal M 6 ´1.0 1 10 1.0 7.2
Bearing plate cover (shift cam) M 6 ´1.0 2 10 1.0 7.2
Shift guide M 6 ´1.0 2 10 1.0 7.2
Stopper lever M 6 ´1.0 1 10 1.0 7.2
Segment M 8 ´1.25 1 30 3.0 22
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2-6
SPECMAINTENANCE SPECIFICATIONS
Part to be tightened Thread size Q'tyT ightening torqueNm m•kg ft•lb
Exhaust pipe M 6 ´1.0 2 12 1.2 8.7
Exhaust pipe stay (front) M 6 ´1.0 1 12 1.2 8.7
Exhaust pipe stay (rear) M 6 ´1.0 1 12 1.2 8.7
Silencer (front) M 6 ´1.0 1 12 1.2 8.7
Silencer (rear) M 6 ´1.0 1 7 0.7 5.1
Fiber (silencer) M 6 ´1.0 2 10 1.0 7.2
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2-9
SPECMAINTENANCE SPECIFICATIONS
NOTE:
1. First, tighten the ring nut approximately 38 Nm (3.8 m•kg, 27 ft•lb) by using the ring nut wrench,
then loosen the ring nut one turn.
2. Retighten the ring nut 7 Nm (0.7 m•kg, 5.1 ft•lb).
Part to be tightened Thread size Q'tyT ightening torqueNm m•kg ft•lb
Handle crown and outer tube M 8 ´1.25 4 23 2.3 17
Under bracket and outer tube M 8 ´1.25 4 20 2.0 14
Handle crown and steering shaft M24 ´1.0 1 145 14.5 105
Handlebar holder (upper) M 8 ´1.25 4 28 2.8 20
Steering ring nut M28 ´1.0 1 Refer to NOTE
Front fork and cap bolt M48 ´1.0 2 30 3.0 22
Front fork and base valve M30 ´1.0 2 55 5.5 40
Cap bolt and damper rod (front fork) M12 ´1.25 2 29 2.9 21
Bleed screw (front fork) and cap bolt M 5 ´0.8 2 1 0.1 0.7
Front fork and protector M 6 ´1.0 6 10 1.0 7.2
Cable guide (front brake hose) and guide stayM 5 ´0.8 1 4 0.4 2.9
Front fork and brake hose holder M 6 ´1.0 2 10 1.0 7.2
Front fork and hose cover M 8 ´1.25 1 16 1.6 11
Front fork and hose cover M 6 ´1.0 1 7 0.7 5.1
Throttle cable cap M 4 ´0.7 2 1 0.1 0.7
Front brake master cylinder and bracket M 6 ´ 1.0 2 9 0.9 6.5
Brake lever (bolt) M 6 ´1.0 1 6 0.6 4.3
(nut) M 6 ´1.0 1 6 0.6 4.3
Brake lever position locknut M 6 ´1.0 1 5 0.5 3.6
Clutch lever (bolt) M 6 ´1.0 1 2 0.2 1.4
Clutch lever holder M 5 ´0.8 2 4 0.4 2.9
Front brake master cylinder cap M 4 ´0.7 2 2 0.2 1.4
Front brake hose union bolt (master cylinder)M10 ´1.25 1 30 3.0 22
Front brake hose union bolt (caliper) M10 ´1.25 1 30 3.0 22
Front brake caliper and front fork M 8 ´1.25 2 23 2.3 17
Grip cap upper and lower M 6 ´1.0 2 4 0.4 2.9
Brake caliper (front and rear) and pad pin plugM10 ´1.0 1 3 0.3 2.2
Brake caliper (front and rear) and pad pin M10 ´1.0 1 18 1.8 13
Brake caliper (front and rear) and bleed screwM 8 ´1.25 1 6 0.6 4.3
Front wheel axle and nut M16 ´1.5 1 105 10.5 75
Front wheel axle holder M 8 ´1.25 4 23 2.3 17
Front brake disc and wheel hub M 6 ´1.0 6 12 1.2 8.7
Rear brake disc and wheel hub M 6 ´1.0 6 14 1.4 10
Brake pedal mounting M 8 ´1.25 1 26 2.6 19
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2-10
SPECMAINTENANCE SPECIFICATIONS
Part to be tightened Thread size Q'tyT ightening torqueNm m•kg ft•lb
Rear brake master cylinder and frame M 6 ´1.0 2 10 1.0 7.2
Rear brake reservoir tank and frame M 6 ´1.0 1 7 0.7 5.1
Rear brake hose union bolt (caliper) M10 ´1.25 1 30 3.0 22
Rear brake hose union bolt (master cylinder) M10 ´1.25 1 30 3.0 22
Rear wheel axle and nut M20 ´1.5 1 125 12.5 90
Nipple (spoke) – 72 3 0.3 2.2
Driven sprocket and wheel hub M 8 ´1.25 6 42 4.2 30
Disc cover and rear brake caliper M 6 ´1.0 2 7 0.7 5.1
Protector and rear brake caliper M 6 ´1.0 2 7 0.7 5.1
Engine mounting:
Engine and frame (front) M10 ´1.25 1 69 6.9 50
Engine and frame (lower) M10 ´1.25 1 69 6.9 50
Engine bracket and frame M 8 ´1.25 2 34 3.4 24
Engine bracket and engine M 8 ´1.25 1 34 3.4 24
Pivot shaft and nut M16 ´1.5 1 85 8.5 61
Relay arm and swingarm M14 ´1.5 1 80 8.0 58
Relay arm and connecting rod M14 ´1.5 1 80 8.0 58
Connecting rod and frame M14 ´1.5 1 80 8.0 58
Rear shock absorber and frame M10 ´1.25 1 56 5.6 40
Rear shock absorber and relay arm M10 ´1.25 1 53 5.3 38
Rear frame and frame M 8 ´1.25 3 29 2.9 21
Swingarm and brake hose holder M 5 ´–4 4 0.4 2.9
Chain tensioner mounting M 8 ´1.25 2 19 1.9 13
Chain support and swingarm M 6 ´1.0 3 7 0.7 5.1
Seal guard and swingarm M 5 ´0.8 4 5 0.5 3.6
Fuel tank mounting M 6 ´1.0 2 10 1.0 7.2
Fuel tank and fuel cock M 6 ´1.0 2 7 0.7 5.1
Fuel tank and seat set bracket M 6 ´1.0 1 7 0.7 5.1
Fuel tank and hooking screw (fitting band) M 6 ´1.0 1 7 0.7 5.1
Fuel tank and fuel tank bracket M 6 ´1.0 4 7 0.7 5.1
Air scoop mounting M 6 ´1.0 8 3 0.3 2.2
Front fender mounting M 6 ´1.0 4 7 0.7 5.1
Rear fender mounting M 6 ´1.0 4 7 0.7 5.1
Side cover mounting M 6 ´1.0 4 7 0.7 5.1
Seat mounting M 6 ´1.0 2 7 0.7 5.1
Number plate M 6 ´1.0 1 7 0.7 5.1
NOTE:
s
s- marked portion shall be checked for torque tightening after break-in or before each race.
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2-11
SPECMAINTENANCE SPECIFICATIONS
EC212300
ELECTRICAL
Part to be tightened Thread size Q’tyT ightening torqueNm m•kg ft•lb
Stator M 6 ´1.0 3 8 0.8 5.8
Rotor M10 ´1.25 1 33 3.3 24
Ignition coil M 6 ´1.0 2 7 0.7 5.1
Item Standard Limit
Ignition system:
Ignition timing (B.T.D.C.) 32°/3000 r/min…
0.52 mm (0.020 in)…
Advancer type Electrical…
CDI:
Magneto-model/Manufacturer F4SS00/YAMAHA…
Source coil 1 resistance (color) 720~1,080 ½at 20°C (68°F)…
(Green/White-Black/Red)
Source coil 2 resistance (color) 44~66 ½at 20°C (68°F)…
(Black-Green/Blue)
Pickup coil resistance (color) 248~372 ½at 20°C (68°F)…
(White/Blue-White/Red)
CDI unit-model/Manufacturer 5MV-00/YAMAHA…
Ignition coil:
Model/Manufacturer 4SS-00/YAMAHA…
Minimum spark gap 6 mm (0.24 in)…
Primary winding resistance 0.14~0.20 ½at 20°C (68°F)…
Secondary winding resistance 6.7~10.1k½at 20°C (68°F)…
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