Tightening Torques; General Tightening Torque Specifications; Engine Tightening Torques - Yamaha XT250X Service Manual

EAS20320

TIGHTENING TORQUES

EAS20330
GENERAL TIGHTENING TORQUE
SPECIFICATIONS
This chart specifies tightening torques for stan-
dard fasteners with a standard ISO thread pitch.
Tightening torque specifications for special com-
ponents or assemblies are provided for each
chapter of this manual. To avoid warpage, tight-
en multi-fastener assemblies in a crisscross pat-
tern and progressive stages until the specified
tightening torque is reached. Unless otherwise
specified, tightening torque specifications re-
quire clean, dry threads. Components should be
at room temperature.
EAS20340

ENGINE TIGHTENING TORQUES

Item
Camshaft sprocket cover bolt
Timing chain tensioner bolt
Intake manifold bolt
Air induction system pipe
Cylinder bolt
Clutch cover bolt
Oil filter element drain bolt
Generator rotor cover bolt
Speed sensor bolt
Crankcase bolt
Drive sprocket cover bolt
Cylinder head bolt (226 mm)
Cylinder head bolt (45 mm)
Camshaft retainer bolt
Tappet cover
A. Distance between flats
B. Outside thread diameter
A (nut)
10 mm
12 mm
14 mm
17 mm
19 mm
22 mm
Threa
Q'ty
d size
M6 2 10 Nm (1.0 m•kg, 7.2 ft•lb)
M6 2 10 Nm (1.0 m•kg, 7.2 ft•lb)
M6 2 10 Nm (1.0 m•kg, 7.2 ft•lb)
M6 2 10 Nm (1.0 m•kg, 7.2 ft•lb)
M6 2 10 Nm (1.0 m•kg, 7.2 ft•lb)
M6 13 10 Nm (1.0 m•kg, 7.2 ft•lb)
M6 1 10 Nm (1.0 m•kg, 7.2 ft•lb)
M6 9 10 Nm (1.0 m•kg, 7.2 ft•lb)
M6 1 10 Nm (1.0 m•kg, 7.2 ft•lb)
M6 12 10 Nm (1.0 m•kg, 7.2 ft•lb)
M6 3 10 Nm (1.0 m•kg, 7.2 ft•lb)
M8 4 22 Nm (2.2 m•kg, 16 ft•lb)
M8 2 20 Nm (2.0 m•kg, 15 ft•lb)
M6 1 8 Nm (0.8 m•kg, 5.8 ft•lb)
M55 2 18 Nm (1.8 m•kg, 13 ft•lb)
2-13
TIGHTENING TORQUES
General tightening torques
B (bolt)
Nm
6 mm 6
8 mm 15
10 mm 30
12 mm 55
14 mm 85
16 mm 130
Tightening torque
m•kg ft•lb
0.6 4.3
1.5 11
3.0 22
5.5 40
8.5 61
13.0 94
Remarks
LT