2004 YAMAHA YZ250LC Manuale duso (in Italian)

2-6
MAINTENANCE SPECIFICATIONSSPEC
Part to be tightened Thread size Q’tyT ightening torqueNm m•kg ft•lb
Primary drive gear M10 ×1.25 1 55 5.5 40
Clutch boss M20 ×1.0 1 75 7.5 54
Clutch spring M 6 ×1.0 6 10 1.0 7.2
Push lever axle M 5 ×0.8 1 6 0.6 4.3
Drive sprocket M20 ×1.0 1 75 7.5 54
Shift guide M 6 ×1.0 2 10 1.0 7.2
Stopper lever M 6 ×1.0 1 10 1.0 7.2
Torsion spring (shift shaft) stopper bolt M 8 ×1.25 1 22 2.2 16
Segment M 8 ×1.25 1 30 3.0 22
Bearing plate cover (shift cam right) M 6 ×1.0 2 10 1.0 7.2
Shift pedal M 6 ×1.0 1 10 1.0 7.2
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2-7
MAINTENANCE SPECIFICATIONSSPEC
EC212201
CHASSIS
Item Standard Limit
Steering system:
Steering bearing type Taper roller bearing…
Front suspension: USA, CDN, ZA,
EUROPE
AUS, NZ
Front fork travel
300 mm (11.8 in)←…
Fork spring free length
479 mm (18.9 in)←474 mm (18.7 in)
Spring rate, STD K=4.3 N/mm K=4.2 N/mm…
(0.438 kg/mm, (0.428 kg/mm)
24.5 lb/in) 24.0 lb/in
Optional spring/Spacer Yes←…
Oil capacity 664 cm
3662 cm3…
(23.4 Imp oz, (23.3 Imp oz,
22.45 US oz) 22.38 US oz)
Oil level
123 mm (4.84 in) 125 mm (4.92 in)…
105~135 mm ←…
(From top of outer tube with inner tube(4.13~5.31 in)
and damper rod fully compressed
without spring.)
Oil grade Suspension oil ←…
“01”
Inner tube outer diameter
48 mm (1.89 in)←…
Front fork top endZero mm (Zero in)←…
Rear suspension: USA, CDN, ZA,
EUROPE
AUS,NZ
Shock absorber travel
132 mm (5.20 in)←…
Spring free length
260 mm (10.24 in) 275 mm (10.83 in)…
Fitting length
245 mm (9.65 in)268 mm (10.55 in)…

240.5~258.5 mm 255.5~273.5 mm…
(9.47~10.18 in) (10.06~10.77 in)
Spring rate, STD K=46 N/mm K=Approx. 48 N/mm…
(4.7 kg/mm, (4.9 kg/mm,
263.2 lb/in) 274.4 lb/in)
Optional spring Yes←…
Enclosed gas pressure
1,000 kPa←…
(10 kg/cm2, 142 psi)
Swingarm:
Swingarm free play limit
End…
1.0 mm (0.04 in)
Side clearance…
0.2~0.9 mm
(0.008~0.035 in)
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2-8
MAINTENANCE SPECIFICATIONSSPEC
Item Standard Limit
Wheel:
Front wheel type Spoke wheel…
Rear wheel type Spoke wheel…
Front rim size/Material 21 ×1.60/Aluminum…
Rear rim size/Material 19 ×2.15/Aluminum…
Rim runout limit:
Radial…
2.0 mm (0.08 in)
Lateral…
2.0 mm (0.08 in)
Drive chain
Type/Manufacturer DID520DMA2 SDH/DAIDO…
Number of links 113 links + joint…
Chain slack 40~50 mm (1.6~2.0 in)…
Chain length (10 links)…
152.5 mm (6.004 in)
Front disc brake:
Disc outside dia. ×Thickness 250 ×3.0 mm 250 ×2.5 mm
(9.84 ×0.12 in) (9.84 ×0.10 in)
Pad thickness 4.4 mm (0.17 in) 1.0 mm (0.04 in)
Master cylinder inside dia. 11.0 mm (0.433 in)…
Caliper cylinder inside dia. 27.0 mm (1.063 in) ×2…
Brake fluid type DOT #4…
Rear disc brake:
Disc outside dia. ×Thickness 245 ×4.0 mm 245 ×3.5 mm
(9.65 ×0.16 in) (9.65 ×0.14 in)
Deflection limit…
0.15 mm (0.006 in)
Pad thickness 6.4 mm (0.25 in) 1.0 mm (0.04 in)
Master cylinder inside dia. 11.0 mm (0.433 in)…
Caliper cylinder insdie dia. 25.4 mm (1.000 in)…
Brake fluid type DOT #4…
Brake lever & brake pedal:
Brake lever position 95 mm (3.74 in)…
Brake pedal height Zero mm (Zero in)…
(vertical height above footrest top)
Clutch lever free play (lever end) 8~13 mm (0.31~0.51 in)…
Throttle grip free play 3~5 mm (0.12~0.20 in)…
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2-9
MAINTENANCE SPECIFICATIONSSPEC
17
14
105
20
22
40
21
0.7
7.2
7.2
11
5.1
0.7
2.9
2.9
2.9
6.5
1.4
4.3
4.3
3.6
2.9
22
22
17
2.2
13
4.3
75
17
8.7
10
19
7.2M 8 × 1.25
M 8 × 1.25
M24 × 1.0
M 8 × 1.25
M28 × 1.0
M51 × 1.5
M30 × 1.0
M12 × 1.25
M 5 × 0.8
M 6 × 1.0
M 6 × 1.0
M 8 × 1.25
M 6 × 1.0
M 4 × 0.7
M 6 × 1.0
M 6 × 1.0
M 5 × 0.8
M 6 × 1.0
M 4 × 0.7
M 6 × 1.0
M 6 × 1.0
M 6 × 1.0
M 6 × 1.0
M10 × 1.25
M10 × 1.25
M 8 × 1.25
M10 × 1.0
M10 × 1.0
M 8 × 1.25
M16 × 1.5
M 8 × 1.25
M 6 × 1.0
M 6 × 1.0
M 8 × 1.25
M 6 × 1.0 Handle crown and outer tube
Under bracket and outer tube
Handle crown and steering shaft
Handlebar holder (upper)
Steering ring nut
Front fork and cap bolt
Front fork and base valve
Cap bolt and damper rod (front fork)
Bleed screw (front fork) and cap bolt
Front fork and protector
Front fork and brake hose holder
Front fork and hose cover
Front fork and hose cover
Throttle cable cap
Grip cap upper and lower
Clutch lever (nut)
Clutch lever holder
Front brake master cylinder and bracket
Front brake master cylinder cap
Brake lever mounting (bolt)
Brake lever mounting (nut)
Brake lever position locknut
Cable guide (front brake hose) and under bracket
Front brake hose union bolt (master cylinder)
Front brake hose union bolt (caliper)
Front brake caliper and front fork
Brake caliper (front and rear) and pad pin plug
Brake caliper (front and rear) and pad pin
Brake caliper (front and rear) and bleed screw
Front wheel axle and nut
Front wheel axle holder
Front brake disc and wheel hub
Rear brake disc and wheel hub
Brake pedal mounting
Rear brake master cylinder and framePart to be tightened Thread size Q’tyTightening torque
Nm m•kg ft•lb
4
4
1
4
1
2
2
2
2
6
2
1
1
2
2
1
2
2
2
1
1
1
1
1
1
2
2
2
2
1
4
6
6
1
223
20
145
28
30
55
29
1
10
10
16
7
1
4
4
4
9
2
6
6
5
4
30
30
23
3
18
6
105
23
12
14
26
102.3
2.0
14.5
2.8
3.0
5.5
2.9
0.1
1.0
1.0
1.6
0.7
0.1
0.4
0.4
0.4
0.9
0.2
0.6
0.6
0.5
0.4
3.0
3.0
2.3
0.3
1.8
0.6
10.5
2.3
1.2
1.4
2.6
1.0
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).
Refer to NOTE.
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2-10
MAINTENANCE SPECIFICATIONSSPEC
M 4 × 0.7
M10 × 1.25
M10 × 1.25
M20 × 1.5
M 8 × 1.25
–
M 6 × 1.0
M 6 × 1.0
M 8 × 1.25
M 8 × 1.25
M10 × 1.25
M10 × 1.25
M10 × 1.25
M16 × 1.5
M14 × 1.5
M14 × 1.5
M14 × 1.5
M10 × 1.25
M10 × 1.25
M 8 × 1.25
M 8 × 1.25
M 5 ×0.8
M 4 ×0.7
M 8 × 1.25
M 6 × 1.0
M 5 ×0.8
M 6 × 1.0
M 6 × 1.0
M 6 × 1.0
M 6 × 1.0
M 6 × 1.0
M 8 × 1.25
M 6 × 1.0
M 6 × 1.0
M 6 × 1.0
M 6 × 1.0
M 6 × 1.0
M 6 × 1.0 Rear brake master cylinder cap
Rear brake hose union bolt (caliper)
Rear brake hose union bolt (master cylinder)
Rear wheel axle and nut
Driven sprocket and wheel hub
Nipple (spoke)
Disc cover and rear brake caliper
Protector and rear brake caliper
Chain puller adjust bolt and locknut
Engine mounting:
Engine bracket and frame
Engine and frame (front)
Engine and frame (upper)
Engine and frame (lower)
Pivot shaft and nut
Relay arm and swingarm
Relay arm and connecting rod
Connecting rod and frame
Rear shock absorber and frame
Rear shock absorber and relay arm
Rear frame and frame (upper)
Rear frame and frame (lower)
Swingarm and brake hose holder
Swingarm and patch
Drive chain tensioner mounting
Chain support and swingarm
Seal guard and swingarm
Fuel tank mounting
Fuel tank and fuel cock
Fuel tank and seat set bracket
Fuel tank and hooking screw (fitting band)
Fuel tank and fuel tank bracket
Seat mounting
Side cover mounting
Air scoop mounting
Front fender mounting
Rear fender mounting (front)
Rear fender mounting (rear)
Number platePart to be tightened Thread size Q’tyTightening torque
Nm m•kg ft•lb
2
1
1
1
6
72
2
2
2
2
1
1
1
1
1
1
1
1
1
1
2
4
4
2
3
4
2
2
1
1
4
2
2
6
4
2
2
12
30
30
125
42
3
7
7
16
34
64
64
64
85
80
80
80
56
53
32
29
1
2
19
7
6
10
7
7
7
7
19
7
4
7
7
12
70.2
3.0
3.0
12.5
4.2
0.3
0.7
0.7
1.6
3.4
6.4
6.4
6.4
8.5
8.0
8.0
8.0
5.6
5.3
3.2
2.9
0.1
0.2
1.9
0.7
0.6
1.0
0.7
0.7
0.7
0.7
1.9
0.7
0.4
0.7
0.7
1.2
0.71.4
22
22
90
30
2.2
5.1
5.1
11
24
46
46
46
61
58
58
58
40
38
23
21
0.7
1.4
13
5.1
4.3
7.2
5.1
5.1
5.1
5.1
13
5.1
2.9
5.1
5.1
8.7
5.1
NOTE:
- marked portion shall be checked for torque tightening after break-in or before each race.
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2-11
MAINTENANCE SPECIFICATIONSSPEC
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 M12 ×1.25 1 56 5.6 40
Ignition coil M 6 ×1.0 2 7 0.7 5.1
Item Standard Limit
Ignition system:
Ignition timing (B.T.D.C.) 0.18 mm (0.007 in)…
Advancer type Electrical…
CDI:
Magneto-model (stator)/Manufacturer 5CU-02/YAMAHA…
Source coil 1 resistance (color) 720~1,080 Ωat 20°C (68°F)…
(Black-Black/Red)
Source coil 2 resistance (color) 44~66 Ωat 20°C (68°F)…
(Green/Blue-Green/White)
Pickup coil resistance (color) 248~372 Ωat 20°C (68°F)…
(White/Blue-White/Red)
CDI unit-model/Manufacturer 5NX-01/YAMAHA…
Ignition coil:
Model/Manufacturer 4MX-00/YAMAHA…
Minimum spark gap 6 mm (0.24 in)…
Primary winding resistance 0.20~0.30 Ωat 20°C (68°F)…
Secondary winding resistance 9.5~14.3 kΩat 20°C (68°F)…
Spark plug cap:
Resistance 4~6 kΩat 20°C (68°F)…
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2-12
GENERAL TORQUE SPECIFICATIONS/
DEFINITION OF UNITS
SPEC
This chart specifies torque for standard faste-
ners with standard I.S.O. pitch threads. Torque
specifications for special components or assem-
blies are included in the applicable sections of
this book. To avoid warpage, tighten multi-faste-
ner assemblies in a crisscross fashion, in pro-
gressive stages, until full torque is reached.
Unless otherwise specified, torque specifications
call for clean, dry threads. Components should
be at room temperature.
A: Distance across flats
B: Outside thread diameter
EC230000
DEFINITION OF UNITS
EC220001
GENERAL TORQUE SPECIFICATIONS
ABTORQUE SPECIFICATION
(Nut) (Bolt)
Nm m•kg ft•lb
10 mm 6 mm 6 0.6 4.3
12 mm 8 mm 15 1.5 11
14 mm 10 mm 30 3.0 22
17 mm 12 mm 55 5.5 40
19 mm 14 mm 85 8.5 61
22 mm 16 mm 130 13 94
Unit Read Definition Measure
mm milimeter 10-
3meter Length
cm centimeter 10-2meter Length
kg kilogram 103gram Weight
N Newton 1 kg ×m/sec2Force
Nm Newton meter N ×m Torque
m•kg Meter kilogrma m ×kg Torque
Pa Pascal N/m2Pressure
N/mm Newton per millimeter N/mm Spring rate
L Liter — Volume or capacity
cm3Cubic centimeter — Volume or capacity
r/min Revolution per minute — Engine speed
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2-1
CARACTERISTIQUES GENERALESSPEC
Nom de modèle: YZ250LC (EUROPE)
YZ250S (USA)
YZ250(S) (CDN, AUS, NZ, ZA)
Numéro de code de modèle: 5XF1 (USA, CDN, ZA)
5XF2 (EUROPE)
5XF4 (AUS, NZ)
Dimensions:USA, ZAAUS, NZEUROPE CDN
Longueur hors-tout 2.183 mm←2.182 mm←
(85,9 in) (85,9 in)
Largeur hors-tout 827 mm←←←
(32,6 in)
Hauteur hors-tout 1.309 mm 1.296 mm 1.302 mm 1.307 mm
(51,5 in) (51,0 in) (51,3 in) (51,5 in)
Hauteur de la selle 991 mm←990 mm←
(39,0 in) (39,0 in)
Empattement 1.481 mm←1.485 mm←
(58,3 in) (58,5 in)
Garde au sol minimale 395 mm←393 mm←
(15,6 in) (15,5 in)
Poids à vide:
Sans huile ni carburant 97,0 kg (213,8 lb)
Moteur:
Type de moteur 2-temps, essence, refroidissement liquide
Dispositions de cylindres Monocylindre, incliné
Cylindrée 249 cm
3(8,76 lmp oz, 8,42 US oz)
Alésage ×course 66,4 ×72 mm (2,614 ×2,835 in)
Taux de compression 9,1~10,9 : 1 (Excepté pour l’EUROPE)
9,1~10,6 : 1 (Pour EUROPE)
Système de démarrage Démarreur au pied
Système de graissage: Mélange (30 : 1)(Yamalube 2-R)
Type ou grade d’huile (2-temps):
Huile de transmission Huile Yamalube 4 (10W-30) ou huile moteur
SAE 10W-30 type SE
Vidange périodique 0,75 L (0,66 Imp qt, 0,79 US qt)
Quantité totale 0,80 L (0,70 Imp qt, 0,85 US qt)
Capacité de liquide de refroidissement
(Toutes les tuyauteries comprises): 1,20 L (1,06 Imp qt, 1,27 US qt)
Filtre à air: Elément type humide
Essence:
Type Excepté pour ZA: Essence super sans plomb d’un
indice d’octane recherche de
95 ou plus uniquement
Pour ZA: Essence super
Capacité du réservoir 8,0 L (1,76 Imp gal, 2,11 US gal)
CARACTERISTIQUES
CARACTERISTIQUES GENERALES
5XF-9-30-2 5/15/03 3:54 PM Page 14