S&S Cycle Super D Gasoline Carburetor - Manual (Page 3)

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2. PREPARE AIR CLEANER BACKPLATE
A. The backplate is a custom application based on your
motorcycle. Determine your choice of breather (head
or case) and drill the backplate accordingly.
B. Use of an Air Horn is a custom application based on
your motorcycle’s set up.
3. INSTALL NEW MANIFOLD
A. Verify that intake ports are clean and ready for
installation.
B. Position manifold with VOES (if equipped) facing up.
Do not tighten bolts at this time.
4. INSTALL CARB
A. Position carb on intake manifold using two 3 ⁄
8
-16 x 1"
socket cap screws provided—do not tighten yet.
B. If you are using a backplate and head breathers, now
is the time to position them.
C. Tighten manifold to heads and then carb to manifold.
NOTE: this is easiest with a 6-inch ball-head Allen.
D. Remove backing plate for throttle cable installation.
1. If you install mounting screws that are too long, they
may bottom without fully tightening. Also, they may
contact the carb bowl or body causing damage and
potential failure.
2. An improperly mounted carburetor could come loose
causing air leaks, poor performance, and damage to
carburetor or other components.
If your motorcycle were to fall over or sustain damage in a
collision, an improperly mounted carburetor could break free
causing a release of gasoline to the surrounding area creating
a fire hazard and potential personal injury to you or others.
5. ROUTE THROTTLE CABLES
A. Since this is a custom application, it is up to you to
determine the appropriate length and routing of
both cables.
B. Ensure that cables do not bind by turning the handlebars
full-lock to each side and operating the throttle. It should
open smoothly with no resistance and snap shut.
If throttle does not return to fully closed position when
released, it may inadvertently stick open possibly causing loss
of control of motorcycle and personal injury to you or others.
C. Apply a thin coat of oil to the fuel inlet fitting and slide
the 90° bend portion of the fuel line in place. Slide
hose clamp in place and secure. Slip protective fuel line
covering over fuel line and position in a way where
there will be no contact with other engine parts.
Connect other end of the fuel line to petcock using the
clamp provided.
6. INSTALL AIR CLEANER BACKPLATE/AIR HORN
A. Since this is a custom application, install backing plate
according to your design.
B. If you are using a filter element and air cleaner cover,
install them now.
C. Check fuel needle and seat assembly to be sure it
works properly. Add enough gas to tank(s) to test the
system. Lean the motorcycle over on the carburetor
side, turn the fuel supply valve on and wait 20 seconds.
If gas starts running out of the carb, turn off petcock
and check needle and seat.
Fuel needle and seat assembly must completely shut off the
fuel supply entering the float bowl and not leak. Gasoline leaks
at the fuel line connections or past the inlet needle may flood
engine and overflow on surrounding area creating fire hazard.
7. CARB OPERATION
A. This carburetor does not have a conventional choke.
Instead, a mixture enrichment device that uses
utilizes separate air and fuel pickup passageways
aides in starting.
B. This device is engaged by raising the lever on top left
side of carburetor and rotating it to position. See
Photo 3.
Photo 2
CAUTION
WARNING
WARNING
Photo 3
WARNING