1
2
6-9C
Piston, cylinder
– Carefully oil the sliding points of all components before mounting.
– Insert the needle bearing into the conrod eye, mount the piston (the
arrow on the piston head indicates the direction of the exhaust port).
– Mount the piston pin and the wire circlips with the open side facing
downwards (see illustration).
– Mount the cylinder base gaskets (recommended gasket thickness:
approx. 0.60 mm / 0.024 in).
– Place the piston on a self-made wooden mounting device and align
the piston rings.
– Mount the preassembled cylinder, remove the mounting device and
clamp the cylinder down with two collar nuts.
!
CAUTION
!
W
HEN MOUNTING THE CYLINDER MAKE SURE THAT THE ROCKER ARM 1 OF THE
CENTRIFUGAL TIMER IS LOCATED IN THE CORRESPONDING RECESS
2 OF THE CON-
TROL SEGMENT IN THE CYLINDER. IF NECESSARY REMOVE THE SMALL CAP ON THE
RIGHT SIDE OF THE CYLINDER AND CHECK
.
Adjusting dimension „X“
NOTE: Dimension „X“ is the distance between the upper piston edge
and the offset upper cylinder edge with the cylinder clamped down and
the piston in position TDC.
Dimension „X“ must be adjusted particularly carefully by inserting
cylinder base gaskets of different thicknesses.
!
CAUTION
!
I
F DIMENSION „X“ IS TOO LARGE, THE COMPRESSION VALUE WILL DECREASE, THUS
REDUCING THE OVERALL ENGINE OUTPUT
. IF DIMENSION „X“ IS TOO SMALL, THE
ENGINE WILL
„PINK“ AND OVERHEAT.
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