Instruction Contents:
A. Introduction
B. Additional Features
C. Kit Contents
D. Polishing, Painting, Plating, or Powdercoating S&S
Crankcases
E. Preparation and Installation
F.
Replacement Parts
Please read these instructions thoroughly before starting
work. Proceed with the installation only after they are
completely understood. These instructions should be
supplemented by the appropriate OEM service manual for
your motorcycle. Follow all safety information.
A. Introduction
S&S Twin Cam Style crankcase assemblies are for Twin
Cam “A” (non-counterbalanced) engine applications,
and are not for use in Twin Cam “B” (counterbalanced)
applications. Installation can be performed by any
Harley-Davidson repair shop equipped to do complete
engine overhauls. No special tools other than those
used in normal engine building operations are required.
Stock bore cases are perfect for stock replacement
applications, 4" bore cases are a natural for use with the
S&S Twin Cam style Super Sidewinder
™
Hot Set Up kits,
and 4-1/8 bore cases make it possible to build really large
displacement custom engines.
NOTE - S&S crankcases are sold in matched sets only.
Individual case halves are not available.
B. Additional
features:
●
Greater overall strength than stock crankcases,
especially in the front motor mount, an important
consideration in high performance applications.
●
All oil passages between the crankcase and gear
cover are o-ring sealed.
●
Compatible with stock components. Use stock oil
pump, cam support plate, gear cover, etc.
●
1999-2002 Timken style sprocket shaft bearing.
(Included)
●
Uses 2003-up pinion shaft bearing (Not Included)
●
Special order Twin Cam style crankcases offer
your choice of cylinder spigot bore, cylinder stud
pattern, and your choice of rear motor mount style
(Twin Cam style or Evolution style).
C. Kit
Contents
Crankcase with camshaft bearings and cylinder studs installed
Sprocket Shaft Bearings
Oil Conduit Block
S&S Reed Valve Assembly
Hardware Package
Certificate of Origin
Instructions
D. Polishing, Painting, Plating, or Powder Coating S&S
Crankcases
S&S Cycle cautions against modifying these
crankcases due to the possibility of damaging or
weakening them. Modifying S&S crankcases in any
fashion voids all manufacturer warranties. Should the
customer elect to modify the crankcases regardless, it
is imperative that they and the information tag attached
to them be inspected beforehand to confirm that the
correct model, style, bore size, etc. have been
provided. The customer must confirm that crankcases
and related parts are correct before assembling them
or having them modified in any manner, and assumes
all liability for modifications.
The customer must also verify that the serial numbers
on the crankcase and attached information tag
correspond with those on the certificate of origin and
packing carton.
Under no circumstance will S&S be held responsible
for expenses related to the modification of any S&S
part in the event warranty service is required. Modified
parts will not be accepted for credit or exchange. This
will apply regardless of cause or fault: customer,
retailer, manufacturer, or other.
For further information, contact S&S Technical Services
at 608-627-8324, FAX 608-627-0766 or e-mail
[email protected]
NOTE - “Modification” includes but is not limited to
appearance changes such as painting, powdercoating,
plating, and polishing. Proper preparation for these
procedures as well as the processes themselves may
require the use of polishing compounds, chemicals or
procedures that are potentially harmful to crankcases.
CAUTION - Passages and internal cavities may become
obstructed by residues from materials used to polish,
paint, plate or powdercoat surfaces. Additionally,
surface finishing processes can damage critical
machined surfaces. Any of the above may cause
premature wear, damage or failure of other engine
components as well as the crankcases themselves.
Powder Coating - Subjecting heat-treated alloys such
as those used in S&S crankcases to excessive heat
3
S&S Twin Cam Style
Crankcase Selection Chart
Bore Size
Natural
Black
Polished
Stock Bore
31-0101
31-0102
31-0103
4" Bore
31-0104
31-0105
31-0106
4-1/8” Bore
31-0107
31-0108
31-0109
Special Order
31-0110
31-0120
