4
6. Insert
1
⁄4 -28 bolt through backing plate from filter
side.
On Big Twins only- position the .200” thick
spacer between the backplate and support
bracket
. Next install the bracket, flat washer and
the Nyloc nut. Repeat with the other mounting
bracket. (See Picture 3 Item C)
7. Align the backplate on carburetor. Do not
tighten completely at this time.
NOTE - Backplate screws supplied with this kit have
thread locking compond on threads. If screw without
thread locking compound is used, a thread locking
compound such as Loctite 242 must be applied, and
screws properly tightened.
8. Align the mounting brackets with the head
breather bolts and secure with backplate screw
#17-0346. Do not tighten completely at this time.
9. Position mounting brackets.
A. On all carbureted models align backing
plate and brackets then tighten all mounting
hardware.
B. On single runner fuel injected models align
and tighten all hardware except backplate
screw. Fill gap between mounting bracket
and breather screw with supplied shims
#50-7113, #50-7114, #50-7115 as needed.
Shims are only used on fuel injected
models. (See Picture 3 Item B)
10. Place wire tie or metal clamp over tee of T-hose,
insert
1
⁄2" steel tube #50-8121 part way into tee
and tighten clamp. Then slide short length of
beveled hose #17-0365 over
1
⁄2" steel tube with
beveled end out and facing down. Tighten
clamp. See Picture 1.
11. Apply a few drops of Loctite 242 (blue) or
equivalent to threads, install nuts and
lockwashers.
12. Tighten all mounting hardware.
NOTE - Torque specifications:
3
⁄4" flat vent fittings 15-20
ft-lb with red Loctite (262) Air Cleaner mounting screw
8-12 ft-lb with no Loctite.
13. Install filter element and air cleaner cover. Secure
with three air cleaner cover screws #50-0072 to
complete installation.
14. Start motorcycle, inspect for leaks, and test ride.
Engine should run smoothly after proper warm-
up. Surging or misfire may indicate lean
carburetion. If necessary, consult professional
mechanic regarding possible need to install
correct carburetor jetting.
A
C
Picture 2
Vent hose, breather fittings and air cleaner mounts installed.
Picture 3
B
A
C
D
A - Breather T-hose in backplate notch.
B - Breather fitting and support bracket.
C - .200" Shim used on 93 and up Big Twins only.
D - Position of shims used on fuel injected models.
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