A. Disconnect battery and shut off fuel petcock.
Unwarranted sparks and inadvertent engagement of starter
from working on electrical components can cause personal
injury
.
B. Remove existing air cleaner assembly, carburetor,
manifold, choke cable and any carburetor
mounting hard
w
are.
2. Check Idle Speed and Mixture Settings
A. Check idle mixture screw setting.
T
urn screw (See Pictur
e 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
.
Closing idle mixture screw too tightly may cause irreversible
damage to needle and seating area in carbur
etor body.
B. 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.
3.
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.
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.
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”.
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.
4.
Install New Manifold
NOTE - Whenever applicable, all carburetor mounting brackets
and hardware supplied in kit must be installed and used to
s
ecure carburetor and air cleaner assembly or air horn (if used)
rigidly to engine.
● An improperly mounted carburetor could come loose from
engine r
esulting 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.
If motor
cycle wer
e 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
.
Install intake manifold provided. Point vacuum advance
fitting upward if it is equipped with one. Do not tighten
manifold clamps or flange bolts.
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.
3
WARNING
CAUTION
Picture 1
Figure A
Enrichment Device
Idle Mixture
Idle Speed
CAUTION
WARNING
E
A
D
C
E
B
(36 pages)
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