2007 YAMAHA YZ250LC Manuale duso (in Italian)

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Page 73 of 596

YAMAHA YZ250LC 2007 Manuale duso (in Italian) 2-6
MAINTENANCE SPECIFICATIONSSPEC
Part to be tightened Thread size Q’tyT ightening torqueNm m•kg ft•lb
Neutral switch lead holder (Except for USA and CDN)M 6 ×1.0 1 14 1.4 10
Kick starter M

Page 74 of 596

YAMAHA YZ250LC 2007 Manuale duso (in Italian) 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

Page 75 of 596

YAMAHA YZ250LC 2007 Manuale duso (in Italian) 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

Page 76 of 596

YAMAHA YZ250LC 2007 Manuale duso (in Italian) 2-9
MAINTENANCE SPECIFICATIONSSPEC
15
15
105
20
29
22
40
21
21
0.7
5.1
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
7.2
2.2
13
4.3
75
15
8.7
10
40
19
7.2M 8 × 1.25
M 8 × 1.25
M24 × 1.0
M

2-9
MAINTENANCE SPECIFICATIONSSPEC
15
15
105
20
29
22
40
21
21
0.7
5.1
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
7.2
2.2
13
4.3
75
15
8.7
10
40
19
7.2M 8 × 1.25
M 8 × 1.25
M24 × 1.0
M 8 × 1.25
M12 × 1.25
M28 × 1.0
M51 × 1.5
M22 × 1.25
M42 × 1.5
M12 × 1.25
M 5 × 0.8
M 6 × 1.0
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
M 6 × 1.0
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
M10 × 1.25
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)
Handlebar holder (lower)
Steering ring nut
Front fork and damper assembly
Front fork and adjuster
Damper assembly and base valve
Adjuster and damper assembly
Bleed screw (front fork) and base valve
Front fork and protector
Protector and brake hose holder
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
Front brake caliper and brake hose holder
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
Footrest bracket and frame
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
2
1
2
2
2
2
2
6
2
2
2
1
2
2
2
1
1
1
1
1
1
2
1
2
2
2
1
4
6
6
4
1
221
21
145
28
40
30
55
29
29
1
7
7
1
4
4
4
9
2
6
6
5
4
30
30
23
10
3
18
6
105
21
12
14
55
26
102.1
2.1
14.5
2.8
4.0
3.0
5.5
2.9
2.9
0.1
0.7
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
1.0
0.3
1.8
0.6
10.5
2.1
1.2
1.4
5.5
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.
1P8-9-32-2 4/29/06 11:45 AM Page 10

Page 77 of 596

YAMAHA YZ250LC 2007 Manuale duso (in Italian) 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

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 5 ×0.8
M10 × 1.25
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
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 bracket and engine
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
Cable guide and frame
Fuel tank mounting boss and frame
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 and fuel tank
Air scoop and panel
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
2
2
1
1
4
2
2
4
2
4
2
2
12
30
30
125
42
3
10
7
19
34
64
64
64
85
70
80
80
56
53
32
29
2
2
16
7
6
4
20
10
4
7
7
7
19
7
7
6
7
7
12
70.2
3.0
3.0
12.5
4.2
0.3
1.0
0.7
1.9
3.4
6.4
6.4
6.4
8.5
7.0
8.0
8.0
5.6
5.3
3.2
2.9
0.2
0.2
1.6
0.7
0.6
0.4
2.0
1.0
0.4
0.7
0.7
0.7
1.9
0.7
0.7
0.6
0.7
0.7
1.2
0.71.4
22
22
90
30
2.2
7.2
5.1
13
24
46
46
46
61
50
58
58
40
38
23
21
1.4
1.4
11
5.1
4.3
2.9
14
7.2
2.9
5.1
5.1
5.1
13
5.1
5.1
4.3
5.1
5.1
8.7
5.1
NOTE:
- marked portion shall be checked for torque tightening after break-in or before each race.
1P8-9-32-2 4/29/06 11:45 AM Page 11

Page 78 of 596

YAMAHA YZ250LC 2007 Manuale duso (in Italian) 2-11
MAINTENANCE SPECIFICATIONSSPEC
MEMO
1P8-9-32-2 4/29/06 11:45 AM Page 12

Page 79 of 596

YAMAHA YZ250LC 2007 Manuale duso (in Italian) 2-12
MAINTENANCE SPECIFICATIONSSPEC
EC212300
ELECTRICAL
Part to be tightened Thread size Q’tyT ightening torqueNm m•kg ft•lb
Stator M 6 ×1.0 3 7 0.7 5.1
Rotor M12 ×1.25 1 56 5.6 40
Ignition c

Page 80 of 596

YAMAHA YZ250LC 2007 Manuale duso (in Italian) 2-13
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 as

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