Caution – S&S Cycle Crankcase for Harley-Davidson Twin Cam 88 Engines User Manual

Page 5

Restricted oil flow may result in extensive engine damage not
covered under warranty.

4- Piston Jet Installation

Apply a thin film of clean engine oil to new O-ring.

b- Seat O-ring in groove of piston jet mounting flange.

With pinhole in the jet pointing upward, install using
two T20 TORX screws. Apply Loctite

243 Blue, then

tighten to 20-30 in-lbs.

Piston jets must be installed using the correct o-ring. Leaving
out a piston jet o-ring, installing too small of an o-ring, or
pinching an o-ring at assembly will cause oil to by-pass the
jet, resulting in low oil pressure.

NOTE: Always use a new o-rings when re-installing jets.

Oil Line Installation

For 1999-2006 Harley-Davidson

FL models

Oil line installation is crucial to engine life. If you are not sure
that you can properly perform this operation, please contact
the S&S Tech Department for a referral to a shop in your area.

NOTE: Installation instructions are based on an engine and

transmission already in the chassis.

NOTE: Apply thread sealant to all tapered pipe threads.

Remove the stock oil supply and return fittings
from the transmission.

Install two supplied

⁄

NPT pipe plugs (S&S PN 50-8330)

in the oil fitting location.

NOTE: Apply thread sealant to all tapered pipe threads.

Remove crankcase vent fitting (S&S PN 50-0451)
and set aside for later use. Install supplied vent
fitting (S&S PN 50-0449 is for use with 2002-’06 with

⁄

ID vent hose or 50-0454 is for use with 1999-’01

with

⁄

ID vent hose) with O-ring installed on fitting.

See Picture 1.

Install the vent hose and clamp (S&S PN 50-8156 or
50-8076-S) on the new fitting.

NOTE: The stock vent hose is reused in this step.

Position a drain container in front of the oil pan.
Next, locate and remove the two plugs on the
forward face of the oil pan allowing the oil to
drain. Once the oil is completely drained, replace
the 3/8” pipe-plug with a 90-degree fitting (S&S
PN 50-8288). Position barb of fitting toward
right side of bike at an angle slightly above
horizontal as shown in Picture 2. Next, install the
oil return fitting (S&S PN 50-0451) with O-ring
(S&S PN 50-8008) in the drain plug location.

CAUTION

FL Oil Line Install Kit (PN 31-0425)

Picture 1 (2002-’06 Shown)

Picture 2

Supply

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