Online version - not for reprint
6 MS 270, MS 280
3.5 Tightening Torques
DG and P screws (Plastoform) are used in polymer and light-alloy 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 always use a torque wrench.
Fastener Thread For component Torque Remarks
size Nm
Spline screw IS-M4x8 Cover plate, chain tensioner/crankcase 3.0
1)
Countersunk screw IS-PT4x12 Cover plate/chain sprocket cover 2.5
2)
Spline screw IS-B3.9x13 Cover plate/fan cover 1.5
Spline screw IS-M8x22 Brake band/crankcase 10.0
3)
Spline screw IS-P4x10 Brake cable, support/tank housing 1.0
4)
Collar screw IS-M10/M8 Guide bar/crankcase 30.0
2) 5) 6)
Collar screw IS-M8x21.5 Guide bar/crankcase 23.0
7) 3) 8)
Spline screw IS-DG4x16 Cover/crankcase 3.0
Decompression
valve IS-M10x1 Decompression valvel 14.0
Collar nut M5 Filter base/baffle/carburetor 5.0
Spline screw IS-B4.2x9.5 Screen/muffler 2.0
9)
Spline screw IS-DG5x24 Hand guard, sleeve/fan cover 4.0
Spline screw IS-DG5x24 Shroud/crankcase 4.5
Spline screw IS-DG5x24 Shroud/fan housing 4.5
Spline screw IS-DG5x18 Chain catcher/crankcase 9.0
Spline screw IS-DG5x18 Spiked bumper/crankcase 9.0
Spline screw IS-DG5x24 Fan cover/fan housing 4.0
Remarks:
1) Special accessory
2) Only machines with quick chain adjuster
3) Secure screw with Loctite 243
4) Only machines with QuickStop Super
5) Secure screw with Loctite 270
6) With quick chain adjuster
7) Only machines without quick chain adjuster
8) Without quick chain adjuster
9) Only muffler with spark arresting screen
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