S&S Cycle VFI Knock Sensor Kit for 2001-07 Delphi Style VFI Module (with USB) User Manual

Page 2

S&S® VFI Knock Sensor Kit and Replacement Parts

S&S VFI Knock Sensor Kit (Includes 55-1015 and 106-1300) .............106-0810
Knock Sensor Kit (Sensor and mounting hardware) ...............................55-1015
S&S VFI Knock Wiring Harness .................................................................... 106-1300
Note that the installation kit may vary slightly if purchased with a complete engine. Not all of the hardware used in the 106-0810 is required for specific
installations. This extra hardware will not be included in S&S engine packages.

WARNING

CAUTION

KNOCK SENSOR MOUNTING

Prior to installation, disconnect and remove the battery, negative cable first. This will eliminate potential sparks and inadvertent
engagement of the starter while working on the motorcycle.

Be careful not to damage the front of the tank when raising or removing it.

It is possible to install the knock sensor assembly and wiring harness without removing the fuel tank. Loosen (do not remove) the bolt at the front
of the tank, and remove the mounting bolt(s) at the rear of the tank. The rear of the tank then can be raised slightly, allowing enough room to install
these components.

NOTE - Clearances are limited at the front of the tank. Use care not to damage any painted surfaces while handling tank.

Installing components without removing the fuel tank is a timesaving suggestion only. If there is any reservation on the part of the installing
mechanic about performing this installation with the fuel tank in place, refer to the appropriate service manual for correct procedure for removing
fuel tank and related components.

• The knock sensor must be mounted to the rear cylinder head for correct operation.
• The knock sensor will provide an incorrect signal if mounted on the front cylinder head.

NOTE - There are two mounting locations possible for the knock sensor. Read the description of each location, and then examine your motorcycle for
which one to use. The first location has better clearance than the second. The knock sensor will work well in either location.

Location 1: Rear cylinder head, across from the temperature sensor on the front head. Some S&S® heads have an unused threaded hole in the rear
head near the intake port. Stock and some S&S heads do not have the unused threaded hole. If the extra threaded hole is present, install the knock
sensor there. See Step a on next page. If the threaded hole is not present, use Location 2.

Location 2: Top motor mount at the rear cylinder head attachment point. All stock heads and some early S&S heads do not have the unused,
threaded hole across from the temperature sensor, and must use the top motor mount location. See Step b on next page.