2-10
TIGHTENING TORQUES
ELECTRICAL
TIGHTENING TORQUES
ENGINE
△
- marked portion shall be checked for torque tightening after break-in or before each race.
Item
Standard
Limit
Ignition system:
Advancer type
Electrical
----
CDI:
Magneto-model (stator)/manufacturer
17D-50/YAMAHA
----
Charging coil 1 resistance (color)
720–1,080
Ω
at 20 °C (68 °F)
(Green–Brown)
----
Charging coil 2 resistance (color)
44–66
Ω
at 20 °C (68 °F) (Black–Pink)
----
Pickup coil resistance (color)
248–372
Ω
at 20 °C (68 °F) (White–Red)
----
CDI unit-model/manufacturer
17D-50/YAMAHA (For USA and CDN)
----
17D-60/YAMAHA (Except for USA and
CDN)
----
Ignition coil:
Model/manufacturer
5UL-20/DENSO
----
Minimum spark gap
6 mm (0.24 in)
----
Primary coil resistance
0.08–0.10
Ω
at 20 °C (68 °F)
----
Secondary coil resistance
4.6–6.8 k
Ω
at 20 °C (68 °F)
----
Part to be tightened
Thread size
Q'ty
Tightening torque
Nm
m•kg
ft•lb
Spark plug
M10S × 1.0
1
13
1.3
9.4
Camshaft cap
M6 × 1.0
10
10
1.0
7.2
Cylinder head blind plug screw
M12 × 1.0
1
28
2.8
20
Cylinder head (stud bolt)
M6 × 1.0
2
7
0.7
5.1
Cylinder head (stud bolt)
M8 × 1.25
1
15
1.5
11
Cylinder head (bolt)
M9 × 1.25
4
38
3.8
27
Cylinder head (nut)
M6 × 1.0
2
10
1.0
7.2
Cylinder head cover
M6 × 1.0
2
10
1.0
7.2
Cylinder
M6 × 1.0
1
10
1.0
7.2
Balancer weight
M6 × 1.0
2
10
1.0
7.2
Balancer shaft driven gear
M14 × 1.0
1
50
5.0
36
Timing chain guide (intake side)
M6 × 1.0
2
10
1.0
7.2
Timing chain tensioner
M6 × 1.0
2
10
1.0
7.2
Timing chain tensioner cap bolt
M6 × 1.0
1
7
0.7
5.1
Impeller
M8 × 1.25
1
14
1.4
10
Radiator hose clamp
M6 × 1.0
10
2
0.2
1.4
Coolant drain bolt
M6 × 1.0
1
10
1.0
7.2
Water pump housing
M6 × 1.0
4
10
1.0
7.2
Radiator
M6 × 1.0
6
10
1.0
7.2
Radiator pipe
M6 × 1.0
1
10
1.0
7.2
Oil pump cover
M4 × 0.7
1
1.7
0.17
1.2
Oil pump
M6 × 1.0
3
10
1.0
7.2
Summary of Contents for YZ250F(Z)
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Page 13: ...1 3 LOCATION OF IMPORTANT LABELS AUS NZ ZA...
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