9. Compression releases and rocker cover
installation.
Refer to the included instructions to install the
compression releases and rocker covers
NOTES:
●
If S&S compression releases will be installed, it is much
easier to install them before the rocker covers are installed
and the engine is installed in the frame. S&S die-cast Twin
Cam style rocker covers or similar rocker covers with a
center hole or “chimney” must be used if S&S electric
compression releases are to be installed.
●
Some installations may have limited rocker cover to
frame clearance and require installing the rocker covers
after placing the engine in the frame.
F. Engine To Frame Assembly
The engine should be installed into the frame after the
engine is assembled, but before the ignition, fuel,
exhaust, and oil system components are installed.
1.
Follow the engine to frame fitting instructions in
section D
2. Replace all other motorcycle components
removed for engine installation. Consult authorized
H-D service manual for installation procedure for
stock parts not covered in S&S instructions.
NOTE - On certain models it may be necessary to switch
the shift linkage to the outside of the shift lever. Make
certain that there is clearance between the shifter rod and
the engine crankcases.
G. Ignition System Installation
1. All Carbureted S&S Twin Cam style engine
assemblies come with an S&S IST (Intelligent
Spark Technology) ignition. Use of this ignition
system is highly recommended. All aspects of
ignition timing-- advance, retard, and curves are
handled automatically by the S&S IST ignition.
2. Once the IST ignition has been installed per the
included instruction sheet #51-1155, no other
adjustments are necessary
NOTES:
●
If the S&S IST ignition is not used, S&S recommends
using electronic ignition with adjustable advance curve in
S&S Twin Cam Style engines. Adjustable curve permits
slowing rate of advance to control or eliminate pinging
under heavy load or when elevated temperatures or poor
quality gasoline encountered.
●
All other ignition systems other than the included S&S
IST ignition install per manufacturers instructions.S&S
recommends setting the total ignition advance to 28
degrees. Timing degree recommendations given by S&S
take precedence over the ignition manufacturers
instructions
CAUTION- Timing that is too advanced will result in
detonation and engine damage. Timing that is too
retarded will result in engine over-heating and engine
damage. (This caution applies only to installations
other than the S&S IST Ignition)
CAUTION If S&S determines that engine damage was
caused by improper ignition timing, repair will not be
covered under warranty.
Excessive ignition advance will cause engine to kick
back against the starter during start-up and “buck” when
ridden at steady speed with partial throttle. An advanced
condition can also cause pinging or ignition knock and
possible piston damage. These symptoms may not be
noticed if electronic ignition with “soft” advance curve is
used.
Excessive ignition retard causes sluggish performance
and severe overheating with possible subsequent damage
to the engine, and must also be avoided. Immediate or
rapid exhaust pipe discoloration is usually a sign of
retarded ignition timing.
12
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