6 MS 290, MS 310, MS 390
3.5 Tightening Torques
DG screws are used in polymer and light metal 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 impairing 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 Remarks
kpm Nm
Screw DG4x15 Cover, chain tensioner/engine housing
0.25 2.5
Collar screw DG8x24 Guide bar 1.6 16.0
Collar screw M10x21 Collar screw for guide bar/engine pan 3.0 30.0 1)
Screw DG4x15 Chain brake cover/engine housing 0.25 2.5
Screw DG4x15 Handle housing/handle molding 0.16 1.6
Screw DG5x24 Handlebar/handle housing 0.35 3.5
Screw DG5x24 Hand guard, left 0.35 3.5 2)
Screw DG4x15 Shroud/engine housing 0.25 2.5
Slotted screw M5 Box filter/carburetor 0.2 2.0
Screw DG5x16 Chain catcher/engine housing 0.35 3.5
Screw DG5x16 Spiked bumper/engine housing 0.35 3.5
Screw DG5x24 Fan housing/engine housing 0.35 3.5
Screw DG4x15 Ground connection to cylinder 0.4 4.0
Carrier M12x1L Carrier/crankshaft 5.0 50.0
Screw DG6x52 Engine housing/cylinder 1.1 11.0
Screw DG5x24 Annular buffer/handlebar 0.35 3.5
Screw DG5x24 Annular buffer/engine housing 0.35 3.5
Locknut M5 Muffler cover/cylinder/screw
0.8 8.0
Nut M8x1 Flywheel/crankshaft 2.8 28.0
Nut M5 Carburetor/handle housing/screw 0.33 3.3
Spark plug M14x1.25 Spark plug 2.5 25.0
Screw DG5x24 Ignition module/engine housing 0.48 4.8
Screw DG4x15 Oil pump 0.4 4.0
Remarks:
1) Loctite 243, medium strength
2) with sleeve
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