36Repair Manual PS-6400/PS-7300/PS-7900
2 (14,0 Nm ± 1,0)
(8,0 Nm ± 0,5)
1
3 mm
4
5
3
6
11 CYLINDER / PISTON
Cylinder / Piston
Disassambly the Starter assy, see page 20.
The arrow on the piston points to the exhaust.
Check the piston ring joint: max. gap 0.5 mm
Decompression valve
The decompression valve 1 greatly reduces the effort
required for starting and thereby reduces wear and
tear on the starter.
Removing the piston
Remove C-rings 12 x 1 and drive out the piston pin
with disassembly mandrel (ø 10 mm). Never use the
c-rings twice.
Check the ring groove, clean if necessary.
Assembling the cylinder
Use a new gasket 5 (965.531.121) for each assembly
instance.
Before assembly, lubricate the big end bearing 6 and
cylinder bore with two-stroke oil.
Use the piston ring tension band and assembly tool
(944.600.001).
The cylinder is screwed to the crankcase with 4 Torx
screws 2 (M5 x 20).
Assembling the induction hose
The induction hose 3 is fixed to the cylinder with a
hose clamp 4.
Tighten the hose clamp until it has a gap of 3 mm.
Tool
(14.0 Nm ± 1.0)
(8.0 Nm ± 0.5)
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