- S&S Cycle

- S&S Cycle
S&S Cycle, Inc.
®
Instruction 51-1006
4-24-06
Copyright © 1998, 1999, 2002, 2006
by S&S Cycle, Inc.
All rights reserved.
Printed in the U.S.A.
235 Causeway Blvd.
La Crosse, Wisconsin 54603
Phone: 608-627-1497 • Fax: 608-627-1488
Technical Service Phone: 608-627-TECH (8324)
Technical Service Email: [email protected]
Website: www.sscycle.com
Because every industry has a leader
Installation and Jetting Instructions for S&S® Super B Series Carburetor
DISCLAIMER:
IMPORTANT NOTICE:
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 effect 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.
Statements in this instruction sheet preceded by the following words
are of special significance.
The words Harley®, Harley-Davidson®, H-D®, Sportster®, Evolution®, and
all H-D part numbers and model designations are used in reference only.
S&S Cycle is not associated with Harley-Davidson, Inc.
SAFE INSTALLATION AND OPERATION RULES:
Before installing your new S&S part it is your responsibility to read and
follow the installation and maintenance procedures in these
instructions and follow the basic rules below for your personal safety.
● Gasoline is extremely flammable and explosive under certain
conditions and toxic when inhaled. Do not smoke. Perform installation
in a well ventilated area away from open flames or sparks.
● If motorcycle has been running, wait until engine and exhaust pipes
have cooled down to avoid getting burned before performing any
installation steps.
● Before performing any installation steps disconnect battery to
eliminate potential sparks and inadvertent engagement of starter while
working on electrical components.
● Read instructions thoroughly and carefully so all procedures are
completely understood before performing any installation steps.
Contact S&S with any questions you may have if any steps are unclear
or any abnormalities occur during installation or operation of
motorcycle with a S&S part on it.
WARNING
Means there is the possibility of injury to yourself or others.
CAUTION
Means there is the possibility of damage to the part or motorcycle.
NOTE
Other information of particular importance has been placed in italic type.
S&S recommends you take special notice of these items.
WARRANTY:
All S&S parts are guaranteed to the original purchaser to be free of
manufacturing defects in materials and workmanship for a period of
twelve (12) months from the date of purchase. Merchandise that fails
to conform to these conditions will be repaired or replaced at S&S’s
option if the parts are returned to us by the purchaser within the 12
month warranty period or within 10 days thereafter.
In the event warranty service is required, the original purchaser must
call or write S&S immediately with the problem. Some problems can be
rectified by a telephone call and need no further course of action.
A part that is suspect of being defective must not be replaced by a
Dealer without prior authorization from S&S. If it is deemed necessary
for S&S to make an evaluation to determine whether the part was
defective, a return authorization number must be obtained from S&S.
The parts must be packaged properly so as to not cause further damage
and be returned prepaid to S&S with a copy of the original invoice of
purchase and a detailed letter outlining the nature of the problem, how
the part was used and the circumstances at the time of failure. If after
an evaluation has been made by S&S and the part was found to be
defective, repair, replacement or refund will be granted.
ADDITIONAL WARRANTY PROVISIONS:
● Consult an appropriate service manual for your motorcycle for correct
disassembly and reassembly procedures for any parts that need to be
removed to facilitate installation.
(1) S&S shall have no obligation in the event an S&S part is modified by
any other person or organization.
● Use good judgement when performing installation and operating
motorcycle. Good judgement begins with a clear head. Don't let
alcohol, drugs or fatigue impair your judgement. Start installation
when you are fresh.
(2) S&S shall have no obligation if an S&S part becomes defective in
whole or in part as a result of improper installation, improper
maintenance, improper use, abnormal operation, or any other misuse
or mistreatment of the S&S part.
● Be sure all federal, state and local laws are obeyed with the
installation.
● For optimum performance and safety and to minimize potential
damage to carb or other components, use all mounting hardware that
is provided and follow all installation instructions.
(3) S&S shall not be liable for any consequential or incidental damages
resulting from the failure of an S&S part, the breach of any warranties,
the failure to deliver, delay in delivery, delivery in non-conforming
condition, or for any other breach of contract or duty between S&S and
a customer.
● Motorcycle exhaust fumes are toxic and poisonous and must not
be inhaled. Run motorcycle in a well ventilated area where fumes
can dissipate.
(4) S&S parts are designed exclusively for use in Harley-Davidson® and
other American v-twin motorcycles. S&S shall have no warranty or
liability obligation if an S&S part is used in any other application.
Important Note: Please read these instructions carefully before
attempting to install or tune your carburetor. Answers to
nearly all your questions and problems can be found in this
way. If you still have a problem, you may call for technical help
at (608) 627-TECH (8324).
Introduction
S&S® Super B carburetor is a butterfly type carb with a fully
adjustable idle mixture screw and changeable mid range and
high speed jets. This carburetor does not have an accelerator
pump nor a conventional choke, but utilizes a mixture
enrichment device for starting. The Super B has a 17⁄8” (47.6mm)
throat at the butterfly and a 19⁄16” (39.6mm) venturi and is
identified by an “B” cast into the throttle return spring side of
the carb body below the cast in wording “S&S SUPER”.
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 effect 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 B
carburetor. Proper preparation to achieve a good chrome finish
requires polishing using buffing compounds. These materials
invariably plug air and/or fuel passageways and feed holes
regardless of the precautions taken.
CAUTION
Plugged passageways and feed holes and the 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 and/ or bowl
is polished, chrome plated or altered in any way.
Kit Contents
Each complete carb kit includes:
● One S&S Super B gas carburetor
2
●
One S&S teardrop air cleaner assembly
●
One manifold
●
Mounting hardware
●
Fuel line and clamps
●
Two extra main jets
●
One extra intermediate jet
●
Voes tubing (when applicable)
●
Installation and jetting instructions
Throttle Requirements
NOTE - S&S Super B carburetor requires the use of a two cable,
pull open - pull closed throttle assembly. Any chassis including
1980 and earlier stock models equipped with a single cable
throttle mechanism requires conversion to a two cable, pull open
- pull closed type.
WARNING
Single, braided wire cable throttle mechanism can not
mechanically close throttle. If throttle inadvertently sticks in
open position, loss of control of motorcycle and personal
injury to you or others may result.
S&S offers an optional two cable throttle assembly designed to
convert most any chassis not equipped with a two cable system.
This kit is available with 48” long cables and can be ordered
separately. See the description below.
Stock models from 1981 to present have a two cable throttle and
should not require conversion. The stock cables on these chassis
can be used but must be modified.
Optional S&S Two Cable Throttle Conversion Kit - for chassis not
equipped with two cable throttle - Part #19-0229 - Includes
complete throttle assembly with grips for both bars and two 48”
(cable housing length) cable assemblies. Fits 1” O.D. handlebars
and can be used on most chassis requiring up to 48” long cables.
Special bushings are available for use with older 7⁄8” O.D. handle
bars, Part #19-0235.
Carb Installation
Read instructions thoroughly before starting work to familiarize
yourself with installation procedure.
NOTE - Installation of S&S Super B carb kits on some models is
easier with gas tanks removed. Some owners may elect to
perform installation without removing gas tanks. This option has
been left to discretion of individual. If one elects to remove tanks
or must disassemble any other stock parts, S&S recommends
owners consult appropriate service manual for their model
motorcycle for reference.
1.
Remove Old Carburetor
●
Gasoline is extremely flammable and explosive under
certain conditions and toxic when breathed. Do not smoke.
Perform installation in a well ventilated area away from
open flames or sparks.
If motorcycle has been running, wait until engine and
exhaust pipes have cooled down to avoid getting burned
before performing any installation steps.
WARNING
●
A.
Disconnect battery and shut off fuel petcock.
D.
1984 to 1992 Harley-Davidson® Evolution® - Thread
plug, part #50-8331, into hole “B” in air cleaner
backplate. Screw crankcase breather vent elbow
fitting, part #50-8110, into hole “A”. See Figure A.
E.
Sportster® models 1986 to 1990 - Thread plug, part
#50-8331, into hole “A” in air cleaner backplate.
Screw crankcase breather vent elbow fitting, part
#50-8110, into hole “B”. See Picture 1.
WARNING
Unwarranted sparks and inadvertent engagement of starter
from working on electrical components can cause personal
injury.
B.
2.
Remove existing air cleaner assembly, carburetor,
manifold, choke cable and any carburetor
mounting hardware.
Check Idle Speed and Mixture Settings
A.
Check idle mixture screw setting.
Turn screw (See Picture 1) clockwise closing it counting
number of turns to fully closed position setting should
be 1 1⁄2 turns. Closing adjusting screw with excessive
force may cause irreversible damage to screw threads in
carburetor body.
CAUTION
Closing idle mixture screw too tightly may cause irreversible
damage to needle and seating area in carburetor body.
B.
3.
Check engine idle speed adjusting screw setting. Turn
screw (See Picture 1) counterclockwise until it no
longer contacts carb body. Next, turn it clockwise
until it just recontacts body. Then, continue turning
additional 1⁄2 turn clockwise, slightly opening throttle
plate, part #11-2055.
Prepare Air Cleaner Backplate
A.
Knucklehead/panhead 1955 to 1965 - Thread plugs, part
#50-8331, into holes “A” and “B” in air cleaner
backplate. See Figure A.
4.
Install New Manifold
NOTE - Whenever applicable, all carburetor mounting brackets
and hardware supplied in kit must be installed and used to
secure carburetor and air cleaner assembly or air horn (if used)
rigidly to engine.
CAUTION
●
●
An improperly mounted carburetor could come loose from
engine resulting in air leaks, poor performance, and damage
to carburetor or other components.
Incorrect combinations of mounting hardware may cause
some mounting bolts to bottom out in holes or
inadvertently contact other parts possibly causing damage
to one or more engine and/or carburetor components.
WARNING
If motorcycle were to fall over or sustain damage in a collision
or rider fall down, an improperly mounted carburetor could
break free causing an unwarranted release of gasoline to
flood surrounding area creating a fire hazard and potential
personal injury to you or others.
A.
Clean intake ports on cylinder heads to insure proper
manifold to head seal.
B.
Shovelhead 1966 to 1979 and ironhead Sportster®
models 1957 to 1979 - Press plugs, part #50-8313, into
holes “D” in air cleaner backplate. See Figure A.
B.
Install intake manifold provided. Point vacuum advance
fitting upward if it is equipped with one. Do not tighten
manifold clamps or flange bolts.
C.
Shovelhead 1980 to 1984 and 1980 to 1985 Sportster®
models - Screw crankcase breather vent elbow fitting,
part #50-8110, into hole “A” in air cleaner backplate in
Figure A. On 1983 and 1984 shovelhead thread plug,
part #50-8331, into hole “B”.
C.
Pans - Loosen center crankcase stud nut between
tappet blocks and bolt bracket, part #16-0096, in
place to connect bottom carb manifold mounting
hole to crankcases.
Enrichment Device
A
D
E
Idle Mixture
Idle Speed
C
E
B
Picture 1
Figure A
3
D.
E.
Shovelhead 1966 to 1982 - Bolt bracket, part #17-0092,
to rear of front rocker cover using 5⁄16 -18 x 5⁄8” bolt,
5⁄16” flatwasher and 5⁄16” lockwasher provided in kit.
Do not tighten. End of bracket with sharp bend goes
toward rocker cover.
Shovelhead 1983 to 1984 - Loosen center crankcase
stud nut between tappet blocks and bolt bracket, part
#16-0471, in place to connect bottom carb manifold
mounting hole to crankcases.
F.
Ironhead Sportster® models - Bolt bracket, part #170093, to front tappet block using 5⁄16 -18 x 11⁄4” bolt,
5⁄16” flatwasher and 5⁄16” lockwasher provided in kit.
Do not tighten. End of bracket with sharp bend goes
toward tappet block.
G.
Bolt carb to intake manifold. Panhead and 1983-’84
shovelhead mounting bolts measure 1” and 1-1⁄4”
long - 1-1⁄4” bolt goes in bottom hole. Snug mounting
bolts. Do not final tighten.
CAUTION
If incorrect length mounting screws are used in carburetor
mounting holes, screws may bottom in mounting hole or contact
carb bowl causing damage to carb body and/or carb bowl.
B.
Thread opening side throttle cable through upper
throttle cable housing boss and throttle cable clamp on
throttle arm.
C.
Repeat step B for closing side throttle cable. Cable
with larger diameter outer housing is used to close
throttle and should be positioned in lower boss on
carburetor body.
D.
Adjust throttle cable adjusters to remove excessive
freeplay and test throttle to be sure it opens and closes
freely. Turn handlebars to extreme left and open and
close throttle, then turn bars to extreme right and check
throttle. If throttle binds, loosen cable freeplay
adjusters to put more freeplay in cables.
NOTE - Throttle must not bind and must snap shut to fully closed
position when released.
WARNING
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.
E.
H. All engines except panhead and shovelhead 1983
to 1984 - Install air cleaner backplate using three
1⁄4-20 x 3⁄4” screw/washer assemblies.
I.
J.
5.
1966 to 1982 shovelhead and all ironhead Sportster®
models - Bolt bracket to air cleaner backplate through
hole “B”. See Figure A. Use 1⁄4” flatwasher and
locknut provided and snug all mounting bracket bolts.
Harley-Davidson® 1984 to 1992 Evolution® and
Sportster® models 1986 to 1990 - Bolt bracket, part
#17-0312, to air cleaner backplate through holes “D”
using two 1⁄4 -28 x 7⁄8” bolts, two 1⁄4 -28 nuts and
1⁄4” flatwashers provided. Fill gap between bracket
and cylinder heads using shims provided in S&S® shim
kit, part #17-0314. Hold backplate, bracket and shims
in place with 5⁄16 -18 x 1” mounting bolts and 5⁄16”
flat and lock washers. Snug all nuts and bolts. Do not
final tighten.
K.
Final tighten manifold mounting clamps and/or
mounting flange bolts.
L.
Remove air cleaner backplate from carburetor.
Install Carb
A.
Determine length of throttle cables required and
shorten if necessary. If outer cables are shortened, inner
cables must shortened also. Be sure to determine
proper length and resolder last 1-1⁄2” of inner cable
before cutting. This will insure cable strands do not
separate. If cable lengths are correct and are equipped
with ball or barrel fittings, last 1-1⁄2” of inner cables
must be soldered before ends are cut off. Apply light
coat of lubrication to inner cables before reassembling.
NOTE - Consult Harley-Davidson® service manual for proper
throttle disassembly and reassembly procedures.
4
Bolt carb to intake manifold using two 3⁄8 -16 x 1”
socket
cap
screws
provided
in
kit.
Knucklehead/panhead and 1983-’84 kits come with
one 1” screw and one 1-1⁄4” screw. The 1-1⁄4“
screw must go in bottom hole and is longer to
compensate for thickness of mounting bracket, part
#16-0096 or #16-0471.
CAUTION
If incorrect length mounting screws are used in carburetor
mounting holes, screws may bottom in mounting hole or
contact carb bowl causing damage to carb body and/or
carb bowl.
F.
Recheck throttle to be sure it opens and closes freely.
See step D.
NOTE - Throttle must not bind and must snap shut to fully closed
position when released.
WARNING
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.
G.
Apply thin coating of oil to fuel inlet fitting and slip
end of fuel line with 90° bend on fitting. Clamp in
place. Slip stock Harley-Davidson® protective fuel line
covering over fuel line if equipped and position where
contact with other engine parts might take place. On
early models equipped with bottom manifold screw
wire fuel line support guide, use guide whenever
possible. Connect fuel line to gas tank petcock using
clamp provided.
WARNING
Fuel line must be clamped securely and not contact any hot
surfaces such as exhaust pipes where it could melt and catch fire.
6.
Install Air Cleaner Backplate
A.
Mount air cleaner backplate on carb using three 1⁄4 -20
x 3⁄4” screw/washer assemblies through holes “C”. See
Figure A.
B.
1966 to 1982 shovelhead and ironhead Sportster®
models - Bolt bracket to air cleaner backplate through
hole “B”. See Figure A. Use 1⁄4” bolt, flatwasher and
locknut provided and snug all mounting bracket bolts.
Final tighten all mounting bracket bolts.
C.
D.
Harley-Davidson® 1984 to 1992 Evolution® and
Sportster® models to 1990 - Bolt air cleaner backplate
bracket to cylinder heads with 5⁄16 -18” bolts,
flatwashers and lock washers. Fill gap between cylinder
heads and mounting bracket with shims as previously
determined in manifold installation step.
NOTE - Fuel needle and seat assembly must completely shut off
fuel supply entering bowl. Fuel inlet fitting to bowl sealing area
and/or fuel line connections must not leak.
CAUTION
Unwarranted gasoline leaking by inlet needle may flood
engine causing damage to components.
WARNING
Unwarranted gasoline leaks , at fuel line connections and/or
past inlet needle may flood engine and overflow on
surrounding area creating fire hazard.
Shovelhead and Sportster® models 1980 to 1985 and all
Evolution® - Connect crankcase breather hose to air
cleaner backplate hose fitting.
B.
If needle and seat assembly works properly, install
element and air cleaner cover using three 1⁄4 -20 x 1”
mounting screws.
C.
Fill gas tank.
Carb Operation
7.
Reassemble Anything That Was Disassembled
Installation and Final Check Installation
for
A.
Check carb to manifold mounting bolts.
B.
Check carb to air cleaner backplate mounting screws.
C.
Check carb mounting bracket to head or to tappet block
mounting bolts and air cleaner backplate to heads
mounting bolts.
D.
Check fuel line connections and routing.
E.
Check vacuum operated advance ignition connections
if applicable.
F.
Check crankcase to air cleaner backplate vent hose
connections if applicable.
G.
Test throttle to be sure it opens and closes freely. Turn
handlebars to extreme left and open and close throttle,
then turn bars to extreme right and check throttle.
NOTE - Throttle must not bind and must snap shut to fully closed
position when released.
WARNING
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.
H. Reassemble anything that was disassembled for
installation. Consult your Harley-Davidson® service
manual for installation of parts not covered in
these instructions.
8.
Bolt on Air Cleaner Cover
A.
Check fuel needle and seat assembly to be sure it
works properly. Fill gas tank with just enough fuel to
test system. Lean motorcycle over towards carburetor
side, turn on fuel petcock and wait 20 seconds. If gas
runs out end of carb, turn off petcock and check
needle and seat.
This carburetor does not have conventional choke. Instead, a
mixture enrichment device, part #11-2084, is used for starting.
This device utilizes separate air and fuel pickup passageways.
This device is engaged by raising the lever on top left side of
carburetor and turning it slightly (See Picture 1).
Enrichment Device NOTES:
● Enrichment pickup tube located directly below fast idle
plunger is pressed into carburetor body and must not
be removed.
CAUTION
Removal of enrichment/fast idle pickup tube from carburetor
body may alter hole size in carb body and cause irreversible
damage to carburetor.
●
Enrichment device may be removed for cleaning purposes,
but must not be disassembled any further.
Cold Starts
1.
Open fuel petcock.
NOTE - When motorcycle is not running, fuel shutoff valve should
always be turned off to prevent possible leakage should needle
and seat not work properly.
CAUTION
Unwarranted gasoline leaking by inlet needle may flood
engine causing damage to components.
WARNING
Unwarranted gasoline leaking past inlet needle may flood
engine and overflow on surrounding area creating fire hazard.
5
2.
3.
Pull enrichment device handle part #11-0084, to raised
position (See Picture 1).
With throttle closed, kick engine through three times.
Electric start models go to step #4 and engage electric starter.
For colder weather, 50° and below, or for engines with long
duration cams, it may be necessary to prime engine several
additional kicks. Low compression and/or cams with long
duration and extreme overlap may reduce cranking
compression to where intake vacuum is low. Low vacuum
reduces draw through enrichment device making it difficult
to get a sufficient prime . If this appears to be the case, close
butterfly completely by turning engine rpm adjustment
screw on throttle arm, part #11-2148, one turn. This will
force all intake vacuum to draw through enrichment device
during priming. After initial startup, turn rpm screw to
original idle position.
NOTE - If throttle is opened during priming, enrichment device
will not provide a rich enough starting mixture.
4.
5.
6.
Turn on ignition.
With throttle closed or slightly cracked, kick engine through.
If engine fails to start immediately, slowly crack throttle (just
enough to barely open butterfly) and continue to kick or
engage starter until engine fires.
After engine starts, leave enrichment device on until engine
has warmed sufficiently. If necessary, jockey throttle slightly
to keep engine running. Motorcycle may now be ridden.
Hot Starts
1.
Unwarranted gasoline leaking by inlet needle may flood
engine causing damage to components.
WARNING
Unwarranted gasoline leaking past inlet needle may flood
engine and overflow on surrounding area creating fire hazard.
Turn on ignition.
With throttle closed, kick engine through or engage
electric starter.
If engine fails to start immediately, open throttle slightly and
continue to kick or engage starter until engine fires.
Troubleshooting Tips - engine will not start:
1.
2.
Fuel supply empty.
Weak or no spark - discharged battery or faulty magneto.
NOTE - We do not recommend use of magnetos as magneto in
poor condition and/or improperly serviced can adversely affect
starting conditions.
3. Plug gap too wide - we use .022 to .025 plug gap on point
type ignition engines.
6
CAUTION
Do not use wire or drill to clear hole. If size is altered, starting
system will be changed resulting in irreversible damage to
carburetor bowl.
WARNING
Compressed air and particles dislodged using compressed air
are harmful to eyes and body. Wear protective goggles when
using compressed air and always direct air stream away from
body parts such as hands and eyes and other people near
you.
8.
Improper diagnosis of rich or lean mixture condition. If
engine backfires in carb, this usually indicates lean condition,
and engine must be reprimed. If there is no response after
three kicks or if engine pops in exhaust pipes, it usually
means mixture is too rich. Leave switch on and slowly open
throttle 1⁄4 turn with each successive kick until engine fires.
Adjusting Carburetor Idle Circuit
CAUTION
4.
7.
Improper ignition timing.
Tight tappet adjustment.
Improper idle mixture and/or engine rpm setting. See
“Adjusting Carburetor - Idle Circuit”.
Enrichment device well feed hole in bowl plugged. Clear
hole with forced air.
Open fuel petcock.
NOTE - When motorcycle is not running, fuel shutoff valve should
always be turned off to prevent possible leakage should needle
and seat not work properly.
2.
3.
4.
5.
6.
Idle mixture screw, part #11-2354, regulates air/fuel mixture at
idle speeds. Throttle stop/engine rpm adjustment screw is
located on throttle arm, part #11-2148 (See Picture 1). S&S®
adjusts both screws during assembly to settings that should work
for initial start-up after installation.
1. Start engine and run until slightly warm (approximately 1 to
2 minutes).
2. Initially adjust engine rpm to idle at approximately
950-1000 rpm.
3. Turn idle mixture screw, part #11-2354, clockwise, leaning
mixture, until engine starts to die. Next, turn screw
counterclockwise, richening mixture, until engine starts to
die. When screw is positioned about halfway between these
points, or about 1⁄4 to 1⁄2 turn out from lean side of
adjustment range, it is set correctly.
CAUTION
Closing idle mixture screw too tightly may cause irreversible
damage to needle and seating area in carburetor body.
4.
5.
Readjust engine rpm to idle at approximately 950-1000 rpm.
After engine and oil have reached normal operating
temperature, repeat steps 3 and 4.
NOTE - Whenever intermediate jet change is made, idle mixture
screw must be readjusted.
Troubleshooting Tips - engine will not idle:
1.
2.
3.
4.
Improper idle mixture and/or engine rpm setting.
Intake manifold air leak.
Sticky timing automatic advance mechanism or other
ignition problem.
Foreign material in air and/or gas passageway in carb
causing flow restriction to idle/intermediate circuit. Clear
holes with forced air.
CAUTION
Do not use wires or drills to clear holes. If sizes are altered,
air/fuel ratios of idle and intermediate systems will be
changed resulting in poor performance and irreversible
damage to carburetor body and intermediate jet.
WARNING
Compressed air and particles dislodged using compressed air
are harmful to eyes and body. Wear protective goggles when
using compressed air and always direct air stream away from
body parts such as hands and eyes and other people near you.
5.
Enrichment device plunger not sealed causing excessively
rich mixture. Be sure device is fully disengaged (in down
position) allowing plunger to bottom out and seal
passageway. CURE: Lift and release plunger several times,
letting it “snap” to closed position to fully seat and seal
against carb body.
NOTES on Intermediate Jetting:
● See “Notes on Intermediate and High Speed Jetting” at
end of “High Speed Circuit or Main Jet” section of
these instructions.
● Whenever intermediate jet change is made, idle mixture
screw must be readjusted.
● Gas mileage and throttling characteristics may also be
determined by personal riding habits. Snapping throttle
open in lower rpm ranges is inefficient and uneconomical
When
because intermediate system is bypassed.
intermediate system is bypassed engine momentarily goes
lean (from lack of fuel from intermediate) then rich (from
excessive fuel from main). In effect, engine uses more fuel
than it should. Engine will respond better and be more
efficient if throttle is rolled on and intermediate has time to
properly engage.
High Speed Circuit or Main Jet
S&S® Super B Jetting Chart
Engine
Displacement
Idle Mixture
Screw Setting
Intermediate
Jet
Main Jet
Stock CH
Stock Big Twin Strokers 84” or
Strokers
Mild Strokers
Larger
1-1/4 to 1-3/4 1-1/4 to 1-3/4 1-1/4 to 1-3/4
turns
turns
turns
.265 to .032
.0295 to .033
.031 to .036
.062 to .070
.068 to .076
.072 or larger
Intermediate System
Intermediate range is used most often under normal riding
conditions and begins right off idle and operates up to
approximately 3000-3500 rpm or 50 to 60 mph depending on
gearing. Therefore, close attention must be paid to jetting
intermediate range to achieve optimum performance and best
gas mileage. Intermediate jet, part #11-7100, is reached by
removing float bowl assembly (See Picture 2). Actual size of
intermediate jet installed in carburetor is indicated on tag
attached to carb and/or on printed label on carburetor packing
box. Keep this information handy for future reference.
1.
2.
3.
4.
Road test bike, being sure to ride it far enough to bring
engine and oil to normal operating temperature.
Re-check idle mixture adjustments to be sure settings are
correct with fully hot engine.
Check throttling characteristics by slowly rolling throttle
on after maintaining steady speed. This should be done
at several rpm levels or speeds of 30,40, and 50 mph. If
“popping” or “spitting” (backfiring) occurs in air cleaner,
this indicates lean condition and intermediate jet must
be changed to next larger size (size is stamped on end or
side of jet).
Change jet accordingly and repeat road test. Smallest
intermediate jet that eliminates this condition should
provide best gas mileage.
Intermediate
Jet
Main Jet
Picture 2
High speed circuit begins around 3000-3500 rpm or 55-60 mph
and operates to maximum attainable speed. Main jet, part #117200, is reached by removing bowl plug, part #11-2090.
NOTE - S&S® has special main jet tool, part #53-0452, which is
handy for changing main jets.
Size of metering hole in main jet in thousandths of an inch is
stamped on end of jet. Size of main jet installed in new
carburetor from S&S is indicated on tag attached to carb and/or
on printed label on carburetor packing box. Keep this
information handy for future reference.
7
Main jet size is best determined by testing at drag strip, because
maximum miles per hour and rpm are best indicators of actual
horsepower engine is developing. S&S® recommends that high
speed jetting be done at drag strip.
2.
Dragstrip Procedure
4.
1.
2.
3.
4.
5.
Warm up engine enough to begin testing.
Make run noting engine rpm and final speed.
Increase or richen main jet size .004 larger and make second
run. Again, note rpm and final speed.
Continue procedure until mph falls off.
Decrease or lean main jet size by .002 to gain best
(maximum) rpm and mph. When making runs, do not strive
for ET’s but for consistent miles per hour.
3.
CAUTION
Do not use wires or drills to clear holes. If sizes are altered,
air/fuel ratios of idle and intermediate systems will be
changed resulting in poor performance and irreversible
damage to carburetor body and intermediate jet.
Street Procedure
S&S uses what we call “RPMing” method to determine correct
main jet size. Hard acceleration is evaluated up to the rpm where
horsepower peaks and begins to taper off and gear shift occurs.
Main jet that makes engine accelerate strongest or rpm through
gears quickest is correct.
1. Warm engine to operating temperature.
2. Accelerate rapidly through gears noting how quickly and
smoothly engine reaches rpm level where pull of engine
begins to fade and gear shift occurs.
3. If engine backfires in carburetor and sputters or “breaks up”
and/or dies during acceleration, increase or richen main jet
size .004 larger and road test again. Note engine
smoothness and how easily engine reaches rpm level where
gear shift occurs.
4. If engine runs flat and sluggish or “blubbers” or will not take
throttle, decrease or lean main jet size .004 smaller and road
test again. Note engine smoothness and how easily engine
reaches rpm level where gear shift occurs.
5. Continue changing main jets until one is selected that makes
engine accelerate or rpm through gears most quickly and
smoothly. Our experience has taught us that a jet about .006
smaller (leaner) than correct one will make engine “break
up” and quit. A jet about .006 larger (richer) will make
engine “blubber” and miss.
Troubleshooting Tips for Intermediate & High Speeds Engine will not run at steady speed or rpm:
1.
Restriction in fuel supply system - gas tank vent plugged,
stock gas petcock too small.
Faulty ignition system - fouled plugs, worn points, defective
coil or solid state module, improper ignition timing.
Incorrect intermediate and/or high speed jetting. See
“Adjusting Carb - Intermediate System” and “High Speed
Circuit or Main Jet”.
Foreign material in air and/or gas passageway in carb
causing flow restriction. Clear holes with forced air.
WARNING
Compressed air and particles dislodged using compressed air
are harmful to eyes and body. Wear protective goggles
when using compressed air and always direct air stream
away from body parts such as hands and eyes and other
people near you.
5.
No air cleaner used or air cleaner used is brand other than
S&S. Some air cleaner designs restrict air flow so that carb
cannot draw air freely as needed. Also, other air cleaners
may obstruct bowl vent hole on inlet end of carb and change
bowl air pressure.
NOTE - Bowl vent hole passageway leads to cavity above fuel in
bowl and is designed to equalize bowl pressure and atmospheric
pressure. If high or low bowl pressure relative to atmospheric
pressure develops, engine may run erratically.
6.
Air horn used without
carburetor body.
shrouding bowl vent on end of
NOTE - Bowl vent should be shrouded to insure uniform
atmospheric air pressure between cavity above fuel level in
bowl and area outside carburetor body. If high or low bowl
pressure relative to atmospheric pressure develops, engine may
run erratically.
7.
Valve train defect - bad valves, sticky valves, bad or broken
springs, improper clearances for high lift cam or, defective
camshaft with improper valve timing.
Bevels must be at angles shown by arrows
when installing plate.
1
2
Arrow 1: Throttle plate horizontal.
Arrow 2: Throttle arm against stop.
Arrow 3: Throttle arm set screw.
Figure B
8
3
Figure C
8.
9.
Too much gear - not enough horsepower to pull gearing.
See “Notes on Intermediate and High Speed Jetting” below.
Notes on Intermediate and High Speed Jetting:
● Carburetor jetting and spark plug color - While spark plug
color may be used to help determine carburetor jetting, S&S®
recommends that our instructions be used as primary jetting
guide and that plug color indications be used only as
secondary aid. We have found that different brands of
gasoline, gasoline additives, engine heat (due to ignition
timing), and type of plugs and heat range used distort plug
color drastically making plug reading difficult for average
tuner. Also, new plugs usually require road test of 10 miles
or more to properly develop color which means that quarter
mile tests may not be long enough and hence, not always a
good indication of carb jetting. It is best to use proven spark
plug combinations and to consult spark plug manufacturer if
you have questions. If one desires to become more
proficient at plug reading, Champion Racing Division has a
very informative booklet which may be helpful.
●
●
●
●
If bike is used exclusively on drag strip where engine
temperatures vary, slightly richer jets may be necessary to
gain best performance. Larger jets or richer mixtures will
enable one to run colder engine which is sometimes
desirable. This is best determined by experimentation with
particular engine to be used.
Cams and exhaust systems can make some engines difficult
to carburate. We have found that certain cams and exhaust
systems will cause poor performance at a specific rpm, and
attempts to carburate to correct this condition usually
destroys carburetion over the balance of the range. A
combination of cam overlap, reversion, and back pressure,
or even lack of back pressure can cause mixture dilution at
certain engine rpms. This dilution will cause engine
roughness or misfiring when engine is held in this range.
Drag pipes - For knucklehead, panhead, shovelhead, and
ironhead Sportster® model engines, 1-7/8” O.D. drag pipes
with straight cutoff end 28” to 30” long will work well with
almost any camshaft and/or other performance
modification. 2” O.D. drag pipes are not recommended for
any applications except very large competition engines. The
use of drag pipes is not recommended for Harley-Davidson®
Evolution® motors in street applications..
Mufflered systems: A very good , economical street exhaust
system for Evolution® and earlier engines as well, consists of
the stock head pipes with the cross-over tube and a set of
S&S low restriction mufflers. This system will typically
produce 10 hp more than drag pipes in the midrange. This
makes an ideal system for the street since the midrange is
where the vast majority of normal driving occurs.
NOTES - General Information
● Carburetor body has seven drilled passages that are
permanently sealed with drive plugs. Do not attempt to
remove these plugs as irreversible damage to carburetor
may result.
●
If throttle arm, part #11-2148, is removed from throttle
shaft, it must be reinstalled in wide open position with
throttle plate, part #11-2055, at 90˚ to the fully closed
position. See Figure B.
●
Throttle plate, part #11-2055, should be checked annually
for signs of wear. Replace if necessary. If carb body needs
repair, use S&S repair kit, part #11-2903, #11-2914 or #112909. If throttle plate is removed, be sure to reinstall it
correctly. See Figure C. Edges of- plate must fit flat against
carb throat.
●
To insure proper seal in needle and seat assembly, float
hinge, needle lift and needle must work freely and must not
bind. If problem is suspected, remove bowl and check float
movement. If obvious misalignment, binding or sticking
occurs, remove and straighten and reinstall to attain free
movement. Reset float level and double check for free
movement. Float must not contact bowl gasket.
●
Normal float setting is 1⁄32” and should be measured at end
of float opposite needle and seat assembly. To check this
measurement, turn bowl upside down and measure from
bowl gasket surface up to float.
●
On rubber mounted engines, set float where it just misses
bowl gasket, part #11-2086, when fuel inlet needle is fully
closed and spring in needle is compressed. See Figure D. To
check, remove bowl and raise float until needle is in closed
position and spring in top of needle is compressed. Highest
part of float should be slightly (approximately 1⁄32”) below
bowl gasket surface. Float must not contact bowl gasket.
●
When motorcycle is not running, fuel shutoff valve should
always be turned off to prevent possible leakage should
needle and seat not work properly.
●
If an air horn is desired for drag racing, use S&S part #170042. Be sure to shroud bowl vent.
●
If you feel you have marginal fuel delivery through your
stock petcock, S&S recommends you try Pingel® petcock, part
#19-0453 for big twins or 19-0454 for Sportster® models
(requires nut #19-0455 for both). Tests conducted at S&S
have shown Pingle petcocks to provide more than adequate
fuel supply. If you require an in line fuel filter, use Pingel
#L1BLK1BLK40G, if room permits (filter is 3” long and
anodized black), or #S1P1P4OG, if room doesn’t permit (filter
is 1 1⁄2” long and polished aluminum).
As a convenience to our customers S&S stocks these Pingel parts.
S&S part #19-0453 - Pingel petcock #5211C for big twins
S&S part #19-0454 - Pingel petcock #31-6011 for Sportster®
models
S&S part #19-0455 - Pingel nut #33-2001
S&S part #19-0457 - Small Pingel filter #S1P1P4OG
9
IMPORTANT NOTE:
We at S&S® feel we have designed and manufactured a quality
carburetor and will stand behind this product. If you have
questions or problems refer to the instruction sheet. Answers
to nearly all your questions can be found in the instructions. If
you still have a problem, you may call for technical help at
(608) 627-TECH (8324).
Float just below gasket
surface (approx. 1/32”)
Spring in needle
fully compressed
S&S also has a complete carburetor repair and/or rebuilding
service where you can get quality work at a fair price. If you are
not properly equipped to take this carburetor apart and repair
it and do not have a qualified local repair shop available, we
recommend you call for a return authorization number and
send it to us with a detailed note outlining any problems you
may have and any repairs you want performed so it can be
serviced correctly.
Figure D
Super B Carburetor Replacement Parts
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
Throttle return spring . . . . . . . . . . . . . . . . . . . . . 11-2082
Throttle plate screw (10 Pack) . . . . . . . . . . . . . . 50-0064
Throttle shaft - includes (2) #50-0029 . . . . . . . . 11-2083
Throttle shaft bushing - for repair only . . . . . . . 11-2134
Enrichment device . . . . . . . . . . . . . . . . . . . . . . . . 11-2084
Carb body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2081
Idle mixture screw . . . . . . . . . . . . . . . . . . . . . . . . 11-2354
Idle mixture screw spring . . . . . . . . . . . . . . . . . . 11-2052
O-ring - 1-7⁄8” (10 Pack) . . . . . . . . . . . . . . . . . . . 50-8101
Throttle plate - 1-7⁄8” . . . . . . . . . . . . . . . . . . . . . 11-2055
Throttle arm assembly - two cable type . . . . . . 11-2148
Intermediate jet - state size. See jet section.
Main discharge tube . . . . . . . . . . . . . . . . . . . . . . 11-2085
Main jet - state size. See jet section.
Bowl gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2086
Float
Style C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2187
Style B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N/A
Float retaining pin . . . . . . . . . . . . . . . . . . . . . . . . 11-2069
Bowl
Style C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2188
Style B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N/A
Needle
Style C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2195
Style B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2095
Seat
Styles B & C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2065
Style C, - threaded seat, not available. See #80.
Bowl plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2090
Bowl screw (10 Pack) . . . . . . . . . . . . . . . . . . . . 50-0063
Gas inlet fitting , 90°- not available. See #80.
7
2
1
5
3
8
9
4
10
6
11
13
12
14
15
16
17
17
18
18
Style A
22
19
21
19
Style B
20
20
20
23
10
16
32.
35.
36.
37.
38.
39.
41.
42.
43.
44.
46.
47.
48.
49.
50.
51.
52.
53.
54.
55.
56.
57.
58.
59.
60.
61.
62.
63.
64.
65.
66.
67.
68.
69.
70.
71.
72.
73.
Knucklehead/panhead manifold
1-7⁄8”, for O-ring style heads . . . . . . . . . . . . . . . . 16-1100
1” spacer - 1-7⁄8” . . . . . . . . . . . . . . . . . . . . . . . . . . 16-0057
Manifold screw
1” (10 Pack) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50-0186
1-1⁄4” (10 Pack) . . . . . . . . . . . . . . . . . . . . . . . . . . . 50-0177
2” (5 Pack) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50-0185
2-1⁄4” (5 Pack) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50-0180
O-ring - for O-ring manifold . . . . . . . . . . . . . . . . 16-0237
Band- for rubberband manifold . . . . . . . . . . . . . 16-0238
Manifold - shovelhead & Harley-Davidson®
ironhead Sportster®
1-7⁄8”, O-ring style, stock length . . . . . . . . . . . . . 16-1200
1-7⁄8”, Rubberband style, stock length. . . . . . . . 16-1300
1-7⁄8”, Rubberband style w/ VOES ignition,
stock length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-1400
Manifold clamp
O-ring style . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-0230
Rubberband style. . . . . . . . . . . . . . . . . . . . . . . . . . 16-0231
Lock nut, 5⁄16 -18 (10 Pack) . . . . . . . . . . . . . . . . 50-5050
Flat washer, 5⁄16 -x 1⁄16 (10 Pack) . . . . . . . . . . . 50-7069
Adjustable support bracket . . . . . . . . . . . . . . . . . 16-0471
Manifold O-ring - Evolution® . . . . . . . . . . . . . . . 16-0236
Manifold flange, all Evolution®
Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-0232
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-0233
Support bracket screw, 5⁄16 -18x1” (10 Pack) . . 50-0155
Manifold - Evolution® 1-7⁄8”, for
Sportster® models, stock cylinder length . . . . . 16-1600
1-7⁄8”, for Evolution®, stock cylinder length . . . 16-1608
Support bracket - panhead . . . . . . . . . . . . . . . . .16-0096
Flatwasher, 3⁄8”, special (10 Pack) . . . . . . . . . . .50-7075
Air horn - includes (3) #50-0071 . . . . . . . . . . . . . .17-0042
Air cleaner assembly - for all engines.
(Does not include mounting brackets.) . . . . . . .17-0099
Air horn screw (10 Pack) . . . . . . . . . . . . . . . . . . .50-0195
Air cleaner cover screw (10 Pack) . . . . . . . . . . . .50-0094
Air cleaner cover . . . . . . . . . . . . . . . . . . . . . . . . . .17-0078
Air cleaner element . . . . . . . . . . . . . . . . . . . . . . . .17-0079
Air cleaner backing plate . . . . . . . . . . . . . . . . . . .17-0080
Air cleaner support bracket - 1957-’85
Sportster® models . . . . . . . . . . . . . . . . . . . . . . . . .17-0093
Vent hose connecter nipple . . . . . . . . . . . . . . . . .50-8111
Vent hose - 3⁄8” ID x 6” . . . . . . . . . . . . . . . . . . . .17-0113
90° elbow fitting . . . . . . . . . . . . . . . . . . . . . . . . . .50-8110
Support bracket bolt - 1⁄4 -28 x 7⁄8” (10 Pack) . .50-0193
Flatwasher, 1⁄4” (10 Pack) . . . . . . . . . . . . . . . . . . .50-7074
Air cleaner backplate screw (10 Pack) . . . . . . . . .50-0096
Air cleaner gasket . . . . . . . . . . . . . . . . . . . . . . . . .17-0196
Allen head plug, 1⁄8 -27 . . . . . . . . . . . . . . . . . . . .50-8331
Mounting hole plug (10 Pack) . . . . . . . . . . . . . .50-8322
Support bracket locknut - 1⁄4 -28 x 7⁄8”
(10 Pack) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50-5015
Air cleaner support bracket 1984 - ‘91 Evolution®
& 1986 - ‘90 Sportster® models . . . . . . . . . . . . . .17-0312
Support bracket screw
5⁄16-18 x 13⁄4” (10 Pack) . . . . . . . . . . . . . . . . . . .50-0234
5⁄16-18 x 11⁄2” (10 Pack) . . . . . . . . . . . . . . . . . . .50-0196
5⁄16-18 x 11⁄4” (10 Pack) . . . . . . . . . . . . . . . . . . .50-0148
Lockwasher - 5⁄16” (10 Pack) . . . . . . . . . . . . . . . .50-7077
Support bracket - (10 Pack) . . . . . . . . . . . . . . . . .50-7075
74.
Shim
5⁄16” x .020” (10 Pack) . . . . . . . . . . . . . . . . . . . . .50-7107
5⁄16” x .030” (10 Pack) . . . . . . . . . . . . . . . . . . . . .50-7070
5⁄16” x .040” (10 Pack) . . . . . . . . . . . . . . . . . . . . .50-7068
5⁄16” x .100” (5Pack) . . . . . . . . . . . . . . . . . . . . . .50-7062
5⁄16” x .125” (5 Pack) . . . . . . . . . . . . . . . . . . . . . .50-7066
Shim
5⁄16” x .250” (5 Pack) . . . . . . . . . . . . . . . . . . . . . .50-7067
5⁄16” x .550” (5 Pack) . . . . . . . . . . . . . . . . . . . . . .50-7065
Shim kit - includes (2) #50-7038, #50-7039,
#50-7040, #50-7041 & (4) #50-7042 . . . . . . . . . . .17-0314
Shim kit - includes (2) #50-7043 &
(2) #50-7045 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17-0313
Air cleaner support bracket ‘66-’82 shovelhead . . . . . . . . . . . . . . . . . . . . . . . . .17-0092
Fuel line w/90° bend - use with #11-2065, N/A . . .19-0475
75.
76.
77.
78.
80.
36
9
39
37
38
41
35
36
36
42
48
32
49
43
46
34
47
36
50
45
77
73
74
51
75
72
76
64
52
69
70
71
62
67 68
54 65
66
53
63
64
61
64 69
65
56
63
64
78
60
57
57
55
11
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