S&S Cycle Closed Loop Oxygen Sensor Kit for Delphi Style S&S Replacement Module - Manual (Page 3)

3
1- This installation requires the motorcycle be equipped with S&S® Variable Fuel Injection (VFI) Delphi® style system.
2- Disconnect the battery, negative terminal first.
3- You will need to install an oxygen sensor in each headpipe. 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 header 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 headers should be installed on the bike.
4- To make locating the sensor a bit easier, S&S technicians have created a mock-up sensor. As you can see in Picture 1, below left, the tip of an
oxygen sensor was cut off so the weld-in boss could be threaded on it and allow the unit to sit flush on a header. Now the assembly can be
put on a pipe to verify that it will not come in contact with any moving parts. Once you are certain of the mounting position, trace the outside
shape of the mounting boss with a marker or scribe as shown in Picture 2, below right.
5- Use an appropriate size drill to achieve a 3⁄4" hole in each of the header pipes. S&S has had good results with the Haugen® Roatabroach® and
the Irwin® Unibit® step drill shown in Picture 3, below.
If exhaust mounting flanges are installed on head pipes, make sure the flange is above the weld-in boss before it is welded in place.
Picture 1
Picture 3
Picture 2
CAUTION
Flange