Yamaha YZ250(N)/LC Owner's Service Manual page 77

Part to be tightened
Rear brake reservoir tank and frame
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
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
Swingarm and brake hose holder
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
Number plate
NOTE:
- marked portion shall be checked for torque tightening after break-in or before each race.
MAINTENANCE SPECIFICATIONS
Thread size
M 6
M10
M10
M20
M 8
M 6
M 6
M 8
M10
M10
M10
M16
M14
M14
M14
M10
M10
M 8
M 5
M 8
M 6
M 5
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
M 6
2-10
Q'ty
Nm
1.0
1
1.25
1 30
1.25
1 30
1.5
1 125
1.25
6 42
–
72
1.0
2
1.0
2
1.25
2 34
1.25
1 69
1.25
1 69
1.25
1 69
1.5
1 85
1.5
1 80
1.5
1 80
1.5
1 80
1.25
1 56
1.25
1 53
1.25
3 29
–
4
1.25
2 19
1.0
3
0.8
4
1.0
2 10
1.0
2
1.0
1
1.0
1
1.0
4
1.0
2
1.0
4
1.0
8
1.0
4
1.0
4
1.0
1
SPEC
Tightening torque
m•kg ft•lb
7 0.7 5.1
3.0 22
3.0 22
12.5 90
4.2 30
3 0.3 2.2
7 0.7 5.1
7 0.7 5.1
3.4 24
6.9 50
6.9 50
6.9 50
8.5 61
8.0 58
8.0 58
8.0 58
5.6 40
5.3 38
2.9 21
4 0.4 2.9
1.9 13
7 0.7 5.1
5 0.5 3.6
1.0 7.2
7 0.7 5.1
7 0.7 5.1
7 0.7 5.1
7 0.7 5.1
7 0.7 5.1
7 0.7 5.1
3 0.3 2.2
7 0.7 5.1
7 0.7 5.1
7 0.7 5.1