Warning – S&S Cycle TWO THROAT Carburetor (Serial E1190 & Higher) User Manual

Page 3

We do not recommend the use of this carburetor with
the single cable throttle assembly. In the interest of
operator safety, we strongly urge installation of a two-
cable throttle. The 1981 and later Harley-Davidson

throttle handle assembly can be adapted for use, or if
one chooses, S&S

Cycle, Inc. can provide or

reasonably price a high quality two cable assembly with
extra long 48" cables. (Complete S&S two-cable throttle
assembly is Part #11-0279).

The stock throttle on 1981 and later models
can be adapted by soldering the last 1

inner cable before cutting the ball or barrel
fitting off the end. The soldering is done to
prevent the strands from separating. Once
this operation is done, remove the carburetor
and feed the cables through the appropriate
bosses on the carburetor. The cable with the
larger diameter outer housing is used to
close the throttle and should be positioned in
the bracketed housing, Part #11-2239, which
is attached to the bowl. When rotating the
throttle handle counterclockwise, looking at
the end of the handlebar, the throttle will
open if the cables are correctly routed. A little
freeplay should be left in both cables when
tightening the throttle arm cable clamp set
screws. Any excessive play can be adjusted
out at the throttle grip cable adjusters before
engine startup.

If the S&S two cable throttle handle assembly
is used, the procedure for installation is much
the same except the outer cables are 48" long
and are both of the same diameter. This
means you may have to shorten the outer
cables if they are too long for your particular
installation Determine the best routing for the
outer cables then clip the ends at the
carburetor once you have determined the
correct length. If you shorten the outer cables,
you must also shorten the inner cables, but be
sure to determine the proper length and
resolder the last 1-1

" of inner cable before

cutting. This will insure the cable strands do
not separate. Apply a light coat of lubrication to
the inner cables and complete the installation.

NOTE - After all cable adjustments are made, work the
throttle several times while turning the handlebars to
extreme right and left before engine startup to be sure the
throttle is snapping off and closing shut all the way. If the
throttle fails to snap shut or close all the way, determine
the cause and correct before engine startup.

NOTE - A thin coating of light grease should be applied to
the throttle arm cam, Part #11-2248, where it contacts the
transfer arm, Part #11-2277, to insure minimized friction
and smooth throttle operation. This grease is necessary
only for the Iast two weeks or so of operation until a
smooth wear pattern is established. Do not lubricate the
pump pushrod, Part #11-2267

3. After installing the throttle assembly, bolt

the carburetor in place using the allen head
bolts provided.

NOTE - For installation on big twins, the stock wire fuel
line bracket should be used to position the fuel line
between the cylinders.

4. The fuel line supplied should be used in place of

the stock line. For Sportster

models, the line is

bent sharply to the rear of the bike over the
carburetor and then around to the inlet fitting on the
bowl. Secure the line on both ends with the
clamps. The fuel line on big twins can normally be
routed between the cylinders. Check or leaks
before starting the engine.

Some bikes are equipped with exhaust systems that
curve around the gear cover directly under the
carburetor. The fuel line must not touch the pipe or
be placed in a position where it is exposed to
extreme heat.

NOTE - We strongly suggest that an in-line fuel filter be
used and spliced into the fuel line to keep foreign material
out of this carburetor. With the small metering holes used
in the intermediate system and the accelerator pump
nozzles, it is wise to insure against contamination to
provide trouble free operation.

The Two-Throat carburetor features a bowl
overflow system. In the event the rider forgets to
shut off the fuel petcock and the needle and seat
assembly sticks, the excess fuel will flow out
through the overflow hose rather than fill the
cylinders with fuel. For Sportster

model

installations, the hose should be routed between
the front cylinder pushrod covers and down
between the crankcase and generator. For big twin
installations, the hose should be routed between
the rear cylinder pushrod covers and down
between the crankcase and transmission.

WARNING