Technical Information 08.2005 Page 7
TI_08_2005_11_01_02.fm
1.6 Decompression system
The automatic decompression system reduces the
compression upon starting and hence the required
pull on the starter rope.
Cam disk at low speed (starting):
. Decompression cam (1) projects and actuates
the lever (2)
. This lengthens the valve opening time, which
reduces the compression
Cam disk when the engine has started:
. The centrifugal mechanism retracts the
decompression cam (1) – this cancels the effect
of the decompression cam
1.7 Carburetor
. All-position diaphragm carburetor with
independent idle
. The range of the high-speed adjusting screw (H)
and the low-speed adjusting screw (L) is limited
by limiter caps (approx. 3/4 turn). This limitation
ensures greater operating safety and
maintenance of future exhaust emission levels
. Accelerator pump for faster and spontaneous
acceleration (see 5.3).
. Choke knob with integrated starting throttle
position
1.8 Ignition system
. Microprocessor-controlled with ignition timing
adjustment
. Low power-up threshold
1.9 Air filter
. Large-area paper air filter for long filter service
life
. Easily accessible
1.10 Muffler
. Two-chamber muffler with spark arresting
screen, depending on the market concerned.
1.11 Flywheel
. Weight-optimised geometry
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