S&S Cycle Super D Gasoline Carburetor - Manual (Page 2)

2
Carb Only – (1.937-inch venturi) .............................PN 11-0112
Carb Only – (2.150-inch venturi) .............................PN 11-0128
Carb Kit With Air Horn ............................................PN 11-0110
Support Bracket........................................................PN 16-0471
(Recommended for any D Carb installation)
The Super D carburetor was designed for racing applications
and should be considered a custom installation. A certain
amount of fabrication and engineering will be required to
adapt this performance carburetor to your motorcycle. It is
delivered in a state of basic tune to help you start the
motorcycle after installation, but final tuning to match your
bike will be required. If you do not feel comfortable with the
steps required in this installation, please visit www.sscycle.com
or call the S&S
® Tech Line at (608) 627-TECH for a recommended
shop in your area.
Your S&S Super D carburetor is designed exclusively for large
displacement big twin engines. It is a butterfly carb with a fully
adjustable idle mixture screw with replaceable mid range and
high speed jets. Additionally, it has a tuneable air bleed circuit.
It doesn’t have an accelerator pump or a conventional choke,
instead it utilizes a mixture enrichment device for starting.
The Super D has both a 1.937- and 2.150-inch venturi
available—depending on your requirements. Also, the S&S
Super D is not recommended for use with a fuel pump.
DISCLAIMER: S&S parts are designed for high performance,
off road, racing applications and are intended for the very
experienced rider only. The installation of S&S parts may void
or adversely affect your factory warranty. In addition such
installation and use may violate certain federal, state, and
local laws rules and ordinances as well as other laws when
used on motor vehicles used on public highways, especially in
states where pollution laws may apply. Always check federal,
state, and local laws before modifying your motorcycle. It is
the sole and exclusive responsibility of the user to determine
the suitability of the product for his or her use, and the user
shall assume all legal, personal injury risk and liability and all
other obligations, duties, and risks associated therewith.
Chrome Plating the Carburetor
NOTE: S&S does not recommend chrome plating the Super D
carburetor. In order to achieve a quality chrome finish, polishing
and buffing are required. These operations invariably plug air
or fuel feed holes, regardless of the precautions taken.
The heat generated during polishing and chrome plating
processes can alter operating tolerances machined into the
parts in critical areas. Additionally, pieces of chrome may
break off and plug a passageway which could potentially
affect the fuel mixture resulting in damage to the engine. S&S
voids any warranty if the carb body or bowl has been
polished, chrome plated or altered in any way.
Throttle Requirements: An S&S Super D carburetor requires the
use of a two cable, pull open - pull closed throttle assembly.
Single, braided wire cable throttle mechanisms can not
mechanically close the throttle. If your throttle inadvertently
sticks in the open position, you could lose control of the
motorcycle and personal injury to you or others may result.
INSTALLATION
NOTE: Installation of S&S Super D carb kits is easier with the
gas tank(s) off of the motorcycle. Some owners may elect to
perform this installation without removing gas tank(s)--an
option left up to the discretion of the technician.
1. IDLE SPEED AND MIXTURE SETTINGS FOR START UP
A. Set idle mixture screw setting by turning it clockwise
until it is fully closed. Now open the screw (turn
counter-clockwise) 1
1 ⁄
2
turns. See Photo 1.
Use caution closing the idle mixture screw; using too much
force can cause permanent damage to the carburetor body.
B. Set engine idle speed adjusting screw setting by
turning it counterclockwise until there is no contact
with carburetor body. Next, turn it clockwise until it
makes contact again, and turn one additional
1 ⁄
2
turn to
open throttle plate slightly. See Photo 2.
WARNING
CAUTION
Photo 1
CAUTION