Tightening Torques - Yamaha YZ250 Owner's Service Manual

ELECTRICAL
Ignition system:
Ignition timing (B.T.D.C.)
Advancer type
CDI:
Magneto-model (stator)/Manufacturer
Charging coil 1 resistance (color)
Charging coil 2 resistance (color)
Pickup coil resistance (color)
CDI unit-model/manufacturer
Ignition coil:
Model/manufacturer
Minimum spark gap
Primary winding resistance
Secondary winding resistance
Spark plug cap:
Resistance

TIGHTENING TORQUES

ENGINE
△ - marked portion shall be checked for torque tightening after break-in or before each race.
Part to be tightened
Spark plug
Cylinder head (nut)
Cylinder head (stud)
Cylinder (nut)
Cylinder (stud)
Power valve:
Holder
Link rod
Push rod
Thrust plate
Side holder
Link lever
Pulley
Cover
Governor fork
Housing
Impeller
Water pump housing cover
Coolant drain bolt
Item
TIGHTENING TORQUES
Standard
0.18 mm (0.007 in)
Electrical
5CU-20/YAMAHA
720–1,080 Ωat 20 °C (68 °F) (Black-
Black/Red)
44–66 Ωat 20 °C (68 °F) (Green/Blue-
Green/White)
248–372 Ωat 20 °C (68 °F) (White/Blue-
White/Red)
1P8-00/YAMAHA
1P8-00/YAMAHA
6 mm (0.24 in)
0.20–0.30 Ωat 20 °C (68 °F)
9.5–14.3 kΩat 20 °C (68 °F)
4–6 kΩat 20 °C (68 °F)
Thread size Q'ty
M14S × 1.25
M8 × 1.25
M8 × 1.25
M10 × 1.25
M10 × 1.25
M5 × 0.8
M5 × 0.8
M5 × 0.8
M5 × 0.8
M5 × 0.8
M4 × 0.7
M4 × 0.7
M5 × 0.8
M4 × 0.7
M5 × 0.8
M8 × 1.25
M6 × 1.0
M6 × 1.0
2-7
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Tightening torque
Nm m•kg
1 20 2.0
6 25 2.5
6 13 1.3
4 42 4.2
4 13 1.3
2 6 0.6
2 6 0.6
1 5 0.5
1 6 0.6
4 4 0.4
1 4 0.4
2 4 0.4
4 4 0.4
2 5 0.5
4 5 0.5
1 14 1.4
4 10 1.0
1 10 1.0
Limit
ft•lb
14
18
9.4
30
9.4
4.3
4.3
3.6
4.3
2.9
2.9
2.9
2.9
3.6
3.6
10
7.2
7.2