S&S Cycle 49-State Certified X-Wedge Engines - Manual (Page 5)

5
3- Install Wiring and Engine Control Module
The safety of the motorcycle rider is dependent on proper installation of this product. If you are not certain of your capabilities or do
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not have the correct tools for this installation, please consult a shop to have it done for you. Improper installation of this product could
result in injury or death to the rider.
Do not connect the battery until completing the installation of the wiring and control system of the motorcycle. Failure to do so may
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result in damage to your wiring harness and other motorcycle electronics which can result in costly repair and service fees. Leaving the
battery disconnected during the entirety of the installation will also prevent accidental starting of the motorcycle which could cause
injury to yourself or others around you.
WARNING
WARNING
CAUTION
To avoid damage to motorcycle and motorcycle components, follow the guidelines specified by the manufacturer when assembling and
servicing your motorcycle.
Overview
The certified X-Wedge engine comes equipped with an S&S® single throat throttle body and makes use of the S&S® Variable Fuel Injection system
(VFI) with closed loop fuel and knock control. Included as part of the VFI system is the ECU, closed loop installation kit, knock control sub harness,
and ignition coil. A wiring diagram has also been provided at the end of this manual for reference during installation.
Wiring Harness
A complete wiring harness is available from S&S®. A fuel injected 2002-2003 Harley-Davidson® FLT or Softail® engine subharness or equivalent may
instead be used as a starting point. If an S&S® harness is not used, it is required that the provided closed loop and knock control circuits are added
into the system.
Take special care not to route the wiring directly over areas prone to reach high temperatures. Failure to do so may result in damage to
your wiring harness and other motorcycle electronics which can result in costly repair and service fees.
Engine Control Unit
The engine control unit (ECU) provided with the certified X-Wedge engine has been calibrated by S&S® for your engine. To meet anti-tampering
requirements the ECU contains a locked calibration file that cannot be modified. Included with the ECU are mounting and installation instructions
for the ECU and a Pro-Tune 2 CD with instructions for accessing the ECU via a computer. This will allow the user to read engine trouble codes and
verify sensor outputs for diagnostic purposes.
Closed Loop Control
The closed loop fuel control system uses oxygen sensors placed in the front and rear exhaust head pipes. A kit has been included with the engine
which includes the oxygen sensors, mating wiring harness and mounting bungs. To mount and install the system follow the instructions below.
1- you will need to install an oxygen sensor in each head pipe. The 3⁄4” holes to mount the sensors will need to be positioned 4” to 12” from the
exhaust flange. If you are using a stock head pipe with a "y" in it, make sure the oxygen sensor is located at least 3"downstream of the "y". To
determine the best position for the oxygen sensors, the head pipes should be installed on the bike.
2- To make locating the sensor a bit easier, S&S technicians have created a mock-up sensor. As you can see in Picture 1, the tip of an oxygen sensor
was cut off so the weld-in boss could be threaded on to it and allow the unit to sit flush on a head pipe. A spark plug with the electrode cut off
can also be used to make a similar mock-up tool. Now the assembly can be put on a head pipe to verify that it will not come in contact with
any moving parts. Once you are certain of the mounting position, scribe or trace the outside shape of the mounting boss with a marker. See
Picture 2.
Picture 1 Picture 2