Fuel Cock; Fuel Tank - Suzuki GS850G Service Manual

FUEL SYSTEM 8 CARBURETORS
FUEL SYSTEM
&
CARBURETORS
FUEL COCK
Thc construction of the diaphra_pm type auto
cock is shown below. When t h e ensine is not
running with the
lever
in
the ON or RES
position, the
valve
i q
kept in the closed
position by applying pressure utilizing a
spring so thar no fuel will flew to the
car-
buretors. When tlic c r ~ ~ i n e is started, a
negative
pressure generared in [he
diaphragm chamber through the
vacuum
(negative pre~sure) pipc
which is connected to
the carburetors, and builds u p
a
negative
pressure which EF iiipher than
t l ~ e
spring
presrure
so
that
I
he diaphrazrn
is
forced to
open the
valve and
thus atlow
the fuel to flow
to
tile carburelors.
When [lie lever i s set at the
PRI
(which
stands
for priming ro supply the
fuel to the carburetors of
an
internal
com-
bustion engines) position, the fuel
Slows
to
the
carburetors not via the diaphragm unit
hut directly l h r o t ~ g h thc RES (reserve) pipe.
ON:
Normally used. Func~ionq as auto
cock.
RES:
Rcserve fttel
i q
used. Function? as
auto
cock.
PRE:
F~rcl
is
dircc~ly supplied. Does not
ft~r~ctiori as auto cock.
The PRI position is used when the
car-
buretors have little
or no
fuel, for example,
when fillins the fuel tank for
the
first time, or
when the
motorcycle has been left
unused for
a long time, or when the carburetors have
been disassembled and repaired. Shift
the
lever
to
the
ON position when the
engine
begins
to run
smoothly.
- -
Cleaning
The fuel cock filter
will collect impurities,
and therefore
must
be periodically checked
and cleaned.
FUEL TANK
The fuel tank
has a cap
with
an air
vent which
is
necessary
for the smooth flow
of the fuel to
the carburetors. The fuel
will not
now
if
the
air
vent is clogged. If this occurs, clean the air
vent with
compressed air.
Install the t a n k
filter cap with tlic arrow mark
facing
toward the front.
Cleaning
Clean the fuel
tank
with flushing oil
at the
same
time the fuel
cock
filter is being cleaned.