S&S Cycle Super B Series Carburetor - Manual (Page 6)

2. Pull enrichment device handle part #11-0084, to raised
position (See Picture 1).
3. 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. Turn on ignition.
5. 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.
6. 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. 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.
Unwarranted gasoline leaking by inlet needle may flood
engine causing damage to components.
Unwarranted gasoline leaking past inlet needle may flood
engine and overflow on surrounding area creating fire hazard.
2. Turn on ignition.
3. With throttle closed, kick engine through or engage
electric starter.
4. 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. Fuel supply empty.
2. 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.
4. Improper ignition timing.
5. Tight tappet adjustment.
6. Improper idle mixture and/or engine rpm setting. See
“Adjusting Carburetor - Idle Circuit”.
7. Enrichment device well feed hole in bowl plugged. Clear
hole with forced air.
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.
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
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.
Closing idle mixture screw too tightly may cause irreversible
damage to needle and seating area in carburetor body.
4. Readjust engine rpm to idle at approximately 950-1000 rpm.
5. 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.
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CAUTION
WARNING
CAUTION
WARNING
CAUTION