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3. 6
CARBURETOR
4.
High
Speed. (
Fig. 3. 131-d
)
Both the throttle
valve
( 151 and the vacuum piston
(16)
are
fully
opened,
and
accordingly,
the jet
needle's condit ion
is
that in
which
the
iet
needle
is mostly lifted up
;
thus, the
fuel is ietted out
from
the needle iet
.
The mixture adiustment is set
at
the
main jet.
When
the motorcycle is delivered, the carburetor
has been set
in the best adjustment
; however,
when
readjusting,
it
should
be noted that
the
individual
jet
operating ranges
are
mutually overlapped
where
they
intersect.
For the idiing adjustment and throttle
valve
turning, re!er
to the
Section on
maintenance
and adjustment.
5.
Float
Level
Adjustment
It is difficult
to measure the height
of
the
fuel
level
itself ;
thus,
the
fuel level
is
decided by
the
height
of the
float
(Fig. 3. 132
).
Placing
the car-
buretor
vertically
as
shown in
Fig. 3. 132
and
lightly
lifting and lowering the
float
(l l l by finger,
deter-
mine the
position where the float
va(ve (6)
head
contacts slightly
the
float arm
(7)
or clearance of
about
0.
l
mm is
left between
them,
and then meas-
ure "H"
with a level
gauge.
If
"H"
is distorted
from
the
rated
value, adjust it by bending
the float
arm
(71
carefully.
NOTE:
Wh
en checking the contact
of the float
valve
(61 and the float arm
(7), it must be done
very
carefully,
because
the
spring
is contained in the
float valve (6)
and if this
valve
head is
pushed,
the spring
is
gone into
the
inside
of the float
valve.
Fig. 3. I
32
Fuel
level adjustment
Fig. 3. 133
Fuel
level gauge
63
H
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