S&S Cycle 124 Twin Cam Style Assembly And Installation Instructions Manual - page 3
S&S Basic Twin Cam Style Engines for Evolution Style Chassis
*
Displacement
Bore Stroke
Fuel
System
Finish
Assembled
Part Number
Natural
31-9340
124"
4
1
⁄
8
"
4
5
⁄
8
"
Carburetor
1
Black
31-9341
Natural
31-9343
124"
4
1
⁄
8
"
4
5
⁄
8
"
S&S VFI
2
Black
31-9344
S&S Basic Twin Cam Style Engines for Twin Cam Style Chassis
*
Displacement
Bore Stroke
Fuel
System
Finish
Assembled
Part Number
Natural
31-9330
124"
4
1
⁄
8
"
4
5
⁄
8
"
Carburetor
1
Black
31-9331
Natural
31-9333
124"
4
1
⁄
8
"
4
5
⁄
8
"
S&S VFI
2
Black
31-9334
* For installation in Stock Harley-Davidson Twin Cam Chassis only. Balanced version unavailable.
1 Carbureted engines include an S&S IST ignition system and an S&S Super G or D carb.
2 Fuel injected Engines include S&S Variable Fuel Injection (VFI) system with your choice of S&S tuned or teardrop induction, and either
Magnetti-Marelli or Delphi style S&S VFI Module
A. Introduction
S&S 124 Twin Cam Engines are available in two
versions The first version is designed and intended for
installation in a stock Harley-Davidson Twin Cam
Chassis. It will bolt directly to the stock transmission
and engine mounts of chassis designed for stock
unbalanced Twin Cam engines. The second version of
Twin Cam style Engine is machined with an Evolution
style rear motor mount. It may be installed in a stock or
aftermarket Evolution style chassis. Both versions are
available in natural aluminum or black powder coat
finish.
S&S 124" Twin Cam style Engines are available only in
a Basic version, meaning that some stock Harley-
Davidson or aftermarket Twin Cam style parts will be
needed to complete the engine. The extra parts
needed include: oil pump, oil pressure switch, cam
support plate, cam cover, tappets, tappet covers, and
oil filter bracket.
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.
NOTES
●
Installation of a fuel injected engine in a motorcycle that
was originally equipped with a carburetor is fairly difficult
and expensive. This conversion requires a fuel pump
equipped gas tank as well as wiring harness.
●
All S&S Twin Cam Style engine assemblies are for Twin
Cam “A” (non-counterbalanced) engine applications, and
are not for use in Twin Cam “B” (counterbalanced)
applications.
●
A balanced Twin Cam style Engine is not available from
S&S Cycle at this time.
3
* For installation in Stock Harley-Davidson Twin Cam Chassis only. Balanced version unavailable.
1 Carbureted Long Blocks include an S&S IST ignition system and an S&S Super G or D carb.
2 Fuel injected Long Blocks include S&S Variable Fuel Injection (VFI) system with your choice of S&S tuned or teardrop induction, and either
Magnetti-Marelli or Delphi style S&S VFI Module
I.
Oil Tank, Fittings and Oil LIne
J.
Exhaust System
K. Initial Start-up and Engine Break-In
L. Tuning Guidelines
M. Engine Specs and Torque Values
N. Service Intervals
O. Replacement Parts
Instruction Contents:
A. Introduction
B. Additional Features
C. Modification Notes
D. Engine to Frame Test Fit
E. Engine Assembly
F. Engine to Frame Assembly
G. Ignition System
H. Fuel System
Please read these instructions carefully before starting work. Proceed with the installation only after the instructions
are completely understood. These instructions should be supplemented by the appropriate OEM service manual for
your motorcycle. Follow all safety information.