Yamaha pw80 - Manual (Page 61)

TORQUE SPECIFICATIONS
The list below covers those stud/bolt sizes with
standard I.S.O. pitch threads. Torque specifi­
cations for components with thread pitches
other than standard are given within the ap­
plicable chapter. Torque specifications call for
dry, clean threads. Components such as the
cylinder or cylinder head should be at room
temperature prior to torquing. A cylinder head
or any other item with several fasteners should
be torqued down in a cross-wise pattern in suc­
cessive stages until torque specification is
reached. The method is similar to installing as
automobile wheel and will avoid warping the
component.
A
(Nut)
B
(Bolt)
General torque
specifications
Nm mkg ftib
10 mm 6 mm 6 0.6 4.3
12 mm 8 mm 15 1.5 11
14 mm 10 mm 30 3.0 22
17 mm 12 mm 55 5.5 40
19 mm 14 mm 85 8.5 61
22 mm 16 mm 130 13 94
A. Distance across flats
B. Outside thread diameter
DEFINITION OF UNITS
Unit Read Definition Measure
mm millimeter 10“^ meter Length
cm centimeter 10'^ meter Length
kg kilogram lO^gram Weight
N Newton 1 kg X m/sec^ Force
Nm Newton meter N X m Torque
m kg Meter kilogram m X kg Torque
Pa Pascal N/m' Pressure
N/mm Newton per millimeter N/mm Spring rate
L Liter Volume
cm^ Cubic centimeter or Capacity
r/min Revolution per minute Engine Speed
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