Carburettor
The 20
mph.
engine is supplied with a carburettor type S
23 A, diameter 8 mm.
(.32")
jet 52 - 50, Throttle valve
nr.
190.
The
25 mph. engine is supplied with a carburettor type S
8 A, diameter 8 mm.
(.32")
jet 54 - 52, Throttle valve
nr.
190.
The 30 mph. engine is supplied with a carburettor type S
22 diameter 12 mm.
(.47")
jet 58 - 56, Throttle valve
nr. 405.
Recently (October 1976) the 30 mph. engine is supplied
with a carburettor type S 25, diameter 12 mm.
(.47")
jet 58 - 56, Throttle valve nr. 167.
Demounting:
The carburettor is fixed on the induction pipe by a
clamping screw.
First remove the intake silencer by detaching the silencer
clip.
Loosen the screw top (nr. 85 pict. 10) of the throttle
valve housing and take the throttle valve nr. 81 out of the
housing.
Unhook the choke cable from the choke valve nr. 95, pull
off the fuel line from the banjo nr. 101 and after
loosening the clamping screw the carburettor can be
pulled off from the intake pipe.
The jet holder nr. 87 with jet nr. 82 is fitted in the
housing.
The jet holder can be screwed out of the carburettor
housing with a scrwedriver.
In the same way the jet can be screwed out of its holder.
A new engine is always equiped with the largest of the
two mentioned jets.
After the break in period this jet unsually must be
replaced by the smaller jet.
In a few cases this jet may be too small, thus giving a
mixture being too poor.
This can be determined easily as follows:
Ride the bike with fully opened gasgrip. After the bike
has reached maximum speed and the engine is on
working temperature the gasgrip must be partly closed
(abt. 30%).
In the bike is apt to ride faster it is evident that the jet is
too small.
In that case the larger jet must be fitted again.
In case of a dirty jet never try to clean it with a wire or a
needle, always clean it by blowing air trough the jet!
The atomiser is fitted on the bottom of the throttle valve
housing.
This atomiser is pressed into the casting on a precise
level,
and can not be replaced. By the way, this will
never be necessary.
The throttle valve nr. 81 has a guide in the housing, so it
can not be mounted faultly.
It may happen, caused by a damage, that the valve can
not move freely inside the housing. In that case the valve
must be burnished wiht polishing paper.
The level in the floatchamber is regulated by a plastic
float nr. 97.
VER& KPL
CARB
CPL.72
1
Pict. 10
10.76
10
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