Description

Twin Tuner EX PN 16103 – ARB EO Legal for the following applications (D-641)

• 2001-2008 Harley Davidson models with a fuel injected engine and a 36 pin connector used on the stock Delphi electronic control module.

All other Twin Tuner Part Numbers are Not legal for sale or use in California or on any pollution controlled vehicles.

The main difference between the Twin Tuner and the Twin Tuner II –> Twin Tuner II also allows you to retard ignition timing to match the requirements on high performance heads, cams or exhaust.

The Twin Tuner allows you to easily adjust your fuel injection to match the requirements of performance parts including camshafts, free flowing exhausts, and low restriction air filters.

You can add up to +30% or remove down to -20% fuel. 

You can use the mode and up/down pushbutton switches to make fuel trim adjustments in the RPM and throttle position ranges required by most applications.

The fuel trim value is displayed on a bright daylight readable LED display. The Twin Tuner also has an advanced mode, where you can use the optional USB Interface and PC Link Tuner software to make precise fuel adjustments. You can make independent adjustments to the front and rear cylinders.

The Twin Tuner works great in combination with the Daytona Sensors Twin Scan II Plus tuning aid (more details below). You don’t need a dyno for precise tuning. All you have to do is install the Twin Scan II PLus and ride the bike around some on a closed course or race track. The Twin Scan software will do the rest.  

Buell^® users please note that the standard Twin Tuner pn 16100 works with the 2008-2010 models with the new DDFI module that has two 34 pin Delphi^® connectors including the new 1125R model with Rotax engine. P/N 16101 is for 2003-2007 models with the earlier DDFI module that has two 12 pin Deutsch connectors. 

Note: Twin Tuner EX pn 16103 is 50 state emissions legal (ARB E.O. D-641). Fuel adjustments with the Twin Tuner EX are only allowed above 60% throttle position or 5000 RPM.  

Download Twin Tuner Instructions

16100-Standard 2001-2011 Twin Cam Models
16101- 2003-2007 Buell Models
16102-Can Bus Models
16103-Standard EX Version
16104- 2008-2013 Touring Models
16105-2007 & Up Sportster Models
16106- 2014 & Up Touring Models

Great Value

We believe that the Twin Tuner offers one of the best values on the market today. Take a closer look and decide for yourself. 

Easy Installation

Installation takes only 10-15 minutes. The install does not require splicing or cutting wires. Installation requires you to remove pins at the Delphi^® ECM. The pictures below show a typical installation for a 36 pin Delphi^® ECM. Installation on 2008-2013 touring models with 73 pin Delphi^® ECM and Buell^® models installation is similar, but different connectors are used. Refer to the instruction sheets for these models for more details. No special tools are required. Just disassemble the ECM connector using a small flat screwdriver as shown below, remove five wires from the ECM connector, insert these wires into our small mating connector, insert five new wires from the Twin Tuner into the ECM connector, and connect one ground wire. The unit is completely encapsulated and impervious to moisture. With a very low profile of only ½” and occupying a fraction of the space required by competitive products, you won’t have a problem finding a place to mount the unit.

Basic Tuning

The Twin Tuner has a 10 position rotary mode switch used to select fuel trim parameters to edit, two digit LED display, and up/down pushbutton switches to change the parameter value. Fuel trim parameters are listed in the table below. Note that the rectangular LED to the left of the two digit LED is illuminated for negative values. You can use a small flat screwdriver to rotate the mode switch. You can make parameter changes on-the-fly with the engine running. 

Twin Tuner Mode Switch Settings Table

Twin Tuner EX Mode Switch Settings Table

The tables above show the engine operating ranges affected by fuel trim values in terms of RPM and throttle position sensor (TPS) values. To properly tune an engine, you need to know what fuel trim values are required. Tuning guidelines and recommended initial settings for common applications are given on the Twin Tuner FAQ page

Advanced Mode

The Twin Tuner also has an advanced mode, where you can use the optional USB interface and Windows software to check and observe system operation (Tuner Log) and make precise fuel and spark retard adjustments (PC Link Tuner).  Setup files are available for common applications.

Twin Tuner Setup Files – zip file download

PC Link Tuner Software

PC Link software runs under Microsoft Windows 7/8/10/11. We no longer support older Windows versions. PC Link allows the user to program all the parameters and fuel trim tables within the Twin Tuner. Minimum PC requirement is a 300 MHz Pentium with super VGA display (SVGA with 1024 x 768 pixel resolution). The Twin Tuner connects to the PC by means of an optional USB interface (P/N USB-INTF). This USB interface also works with all Daytona Twin Tec engine controls (ignition and fuel injection systems). The PC must have a free USB port. Before the engine is started, you can download or upload data with PC Link.

USB Driver – Install

 

You can edit various tables and parameters. 3D tables are used for front and rear cylinder fuel trim. 3D fuel trim tables are accompanied by chart displays that help visualize the data. With the Twin Tuner EX, the range from 500-4500 RPM below 60% throttle position is locked out and displayed in red. You can print the data associated with an active table or Twin Tuner parameters by using the appropriate Print command from the File menu. You can open and save tuning files to disk. 

 

Data Export and Import by Means of Copy and Paste

You might want to export or import 3D table data to or from another application such as Microsoft Excel and other programs with tables that support copy and paste operations. You can directly copy and paste data to and from the PC Link Tuner program. In the PC Link Tuner program, you can select a range of cells with the mouse and right click to bring up a copy and paste menu. When you paste data into the PC Link Tuner program, the data is automatically checked and any out-of-range data corrected.

 

 

PC Link software is free! You can always download the latest version of the software and instruction sheet from our website. The software will run in demo mode without a Twin Tuner system attached. For your convenience, we include all of our software online for you to download at anytime. Refer to the links above or go to our software page.

Download PC Link Tuner Software – Install

 

Using the Twin Scan II Plus Tuning Aid

The Twin Scan can be a complete kit for engine diagnostics and tuning on Harley-Davidson^® motorcycles with Delphi^® fuel injection. It can includes a WEGO IIID dual channel wide-band oxygen sensor system for logging front and rear cylinder air/fuel ratio (AFR) data along with engine data. In addition to use with the Twin Tuner, the Twin Scan can also be used as a tuning aid for Screamin Eagle^® Pro Super Tuner, Screamin Eagle^® Race Tuner (SERT), and Dynojet^® Power Commander^® systems. Twin Scan software analyzes logged data and displays AFR and the required fuel correction (in percent) with the same RPM rows and throttle position sensor (TPS) or manifold pressure (MAP) columns used in Super Tuner, Power Commander^®, and Twin Tuner tables. When used with the Twin Tuner, you can directly export calculated fuel correction data to Twin Tuner data files. The system can be used for tuning on a dyno or under actual riding conditions on a closed course or race track.  

Tuner Log Software – Install

When the engine is running, you can display real time engine data on an instrument panel type screen by using the View Real Time Data command on the View menu.

You can also check proper operation of the throttle position sensor (TPS) when the run/stop switch is on (engine not running). Rotate the throttle through the full range of motion. The TPS% value should go from zero to 100%.  

Real time engine data is displayed on an instrument panel type layout with a round tach gauge and bar graph type gauges for all other parameters. Status messages are displayed in a separate window.

 

Tuner Log software is free! You can always download the latest version of the software and instruction sheet from our website. The software will run in demo mode without a Twin Tuner system attached. For your convenience, we include all of our software online for you to download at anytime. Refer to the links above or go to our software page.