S&S Cycle TWO THROAT Carburetor (Serial E1190 & Higher) - Manual (Page 2)

The S&S ® Two-Throat series carburetor has been designed for all size displacement Harley-Davidson ® Sportster ® models
and big twin engines. The carburetor is of the fixed main jet type with fixed intermediate jets, fixed intermediate air bleeds
and an adjustable idle mixture screw. The carburetor has two individual 1
5 /
8
" throats, each of which supplies a cylinder
through a special manifold with separate induction tracts. The carburetor utilizes an accelerator pump to improve throttling
response and a conventional choke to aid in cold weather starting.
The S&S Two-Throat series carburetor kit contains the
following items:
One carburetor.
One air cleaner with mounting bracket.
One intake manifold, insulator block, gaskets & bolts.
One fuel line and two clamps.
Two extra sets main jets.
Two extra sets intermediate air bleeds.
One extra sets intermediate jets.
One bowl overflow hose.
Shovelhead Installation Sportster ® Model Installation
A. Sportster ® and Big Twin Installation
1. The old carburetor and manifold must be removed
and the manifold supplied with the kit installed. If the
carburetor is to be used on a knucklehead or
panhead, a bracket is furnished that bolts to the
center crankcase stud and the bottom front manifold
bolt. When this bracket is used, the bottom front
manifold bolt supplied is
1 /
8
" longer and must be used
in the bottom front hole only. For installation on
Sportster
® models, a bracket is furnished that bolts to
the front intake cam stud and the air cleaner back
plate. On shovelheads, a bracket that bolts to the
front cylinder rocker box cover and the back plate is
used. After the manifold is installed, temporarily bolt
the carburetor in place.
2. A two cable "pull-pull" type throttle handle assembly
should be used with the Two-Throat carburetor. This
S&S carburetor is fitted with an accelerator pump,
and because of the additional mechanical pump
linkage, the throttle arm assembly has provisions for
the two cable system to insure a positive on-off
throttle movement.
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