Download FS 550

2.6
Tightening Torques
DG and P screws (Plastoform) are used in polymer and lightmetal components. These screws form a permanent thread when they are installed for the first time. They can be removed and installed as often as necessary
without detrimentally affecting the strength of the screwed assembly, providing the specified tightening torque is
observed. For this reason it is essential to use a torque wrench.
Fastener
Thread
size
For component
Torque
Nm
lbf.ft
Spline screw
Spline screw
Spline screw
Plastoform screw
Collar screw
Spline screw
Plastoform screw
Spline screw
Spline screw
Grub screw
Spline screw
Spline screw
Spline screw
Spline screw
Spline screw
Spline screw
IS-M4x25x10
IS-M4x6
IS-M5x28
IS-P4x16
IS-P3.5x10.6
IS-M5x30
IS-P4x16
M10x1
IS-M5x25
IS-M5x30
IS-M6x8
IS-M4x16
IS-M4x20
IS-M5x18
IS-M5x28
IS-M8x25
IS-M6x25
2.5
5.0
4.5
1.0
1.1
2.0
1.0
14.0
4.5
10.0
4.5
3.5
4.0
4.5
7.5
20.0
1.8
3.7
3.3
0.75
0.8
1.5
0.75
10.3
3.3
7.5
3.3
2.6
3.0
3.3
5.5
15.0
8.0
5.9
Spline screw
IS-M5x12
Spline screw
Spline screw
Spline screw
Spline screw
Spline screw
Spline screw
Nut
Spline screw
IS-M5x20
IS-M5x20
IS-M5x18
IS-M5x18
IS-M5x20
IS-M5x20
M14x1.5 L
IS-M6x50x24
4.5
9.5
9.5
4.5
3.5
10.0
10.0
25.0
3.3
7.0
7.0
3.3
2.6
7.5
7.5
18.5
Spline screw
Self-tapping screw
Self-tapping screw
IS-M5x20
BZ4.2x14
B4.2x9.5
Cover on spark plug boot/shroud
Heat shield/crankcase
AV housing, bottom/top
Control handle/handle moldings
Detent spring/slide control
Control handle
Cover/guide
Decompression valve
Guide/crankcase
Gear housing/drive tube
Gear housing (centering screw)
Shroud/crankcase
Clamp/handlebar/tube
Clamp/handlebar
Clamp/AV housing
Clutch shoe/flywheel
Drive tube/clutch housing
(clamp screw)
Drive tube/clutch housing
(centering screw)
clutch housing/crankcase
Crankcase
Perforated rail/AV housing, top
Annular buffer/AV housing
Muffler/crankcase
Muffler/cylinder
Cutting tool
Cutting tool deflector/clamp/
drive tube
Screen/crankcase
Screen/shroud
Spark arresting screen
4.5
4.5
1.5
2.5
3.3
3.3
1.1
1.8
FS 500, 550
Remarks
1)
1)
2)
1)
5