Power Vision Firmware Update


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Power Vision Firmware Update

Keep on Tuning!  Dynojet Power Vision supports the latest updates for H-D motorcycles with the new firmware level and tune database.

We just released a new firmware and tune database for Power Vision, firmware, and tune database Which means Power Vision now supports two new software levels for Harley-Davidson Motorcycles; 621 and 822.

Software level 621 is used on 2014 and newer Softail & Dyna 110” models.


822 is used on 2017-2018 Touring models.


Simply use the update client to manage the download and installation of the latest firmware.  Once updated you’ll be able to tune these new software levels using the original tune as the basis, or use 617 (for 621) or 723 (for 822) level calibrations in their place.  To avoid any voids in service, the Power Vision Tune License Program has also been updated and will support these new software levels.

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What is Rev X-tend on Dynojet’s Power Commander V?


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What is Rev X-tend?

Rev X-tend is a feature within the Power Commander that allows you to change the engine’s rev-limiter. This feature can only be used on some models where the Power Commander has control of the vehicle’s ignition. If you have a “Fuel Only” PC5 unit, you would need to add an Ignition Module accessory to use the Rev X-tend feature.

What models PC5 includes Rev X-tend?

Some PC5units have Fuel and Ignition Control “built-in” to one unit. In most of those units, you can use the Rev X-tend feature. Most of those Rev X-tend compatible units are pre-configured to give you 500 RPM more than the stock rev-limiter, without the need for any key-code. You can get 500 RPM more than stock just by checking the box and enabling the Rev X-tend feature from the software. Some Fuel and Ignition PC5 units that have a pre-configured Rev X-tend feature that gives 500 RPM more than stock include units for Harley Davidson, Victory motorcycles, and many Honda, Yamaha, Kawasaki , and Suzuki models that only have only one or two cylinders.


In the Power Commander V software you can enable Rev X-tend by going to Power Commander Tools>Configure>Feature Enable and Input Selections.


Do I need Rev X-tend to run my bike on the dyno?


Why would I need to adjust my RPM?

The Rev X-tend feature can be setup to lower a engine’s rev-limiter. You might want to lower the rev-limit RPM to limit the power output for a novice rider. In most circumstances the feature is used to raise the rev-limiter for a modified engine that has the capability of producing more power at higher RPMs.

How do I set my RPM to a different configuration?

In some cases, you can get 500 RPM more than stock just by checking the Rev X-tend enabling checkbox in the Features window of the PC5 software. A key-code is needed if you want to set the Rev X-tend feature at any other RPM than what it is set at currently.


What is the key-code for?

A key-code is only needed if you want to set the Rev X-tend feature at any other RPM than what it is set at currently.
You must submit a Rev X-tend Request Form to get a key-code from Dynojet. You can download the Rev X-tend Request Form here:

It can be faxed to 702-399-1431, or you can e-mail the form directly to as an email attachment. Please make sure the serial number, return email address, and desired rev-limit are clearly legible and that the form has a signature.

As always, let us know if you have any questions.

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How to Flash Your Vehicle with the Power Vision CX


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To ensure your Power Vision CX is up to date watch Power Vision CX: How to Update Your Firmware.


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Power Vision CX: How to Update Your Firmware


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In this tutorial you will learn how to update the Power Vision CX using Dynojet’s Power Core Software.


Step 1: Go to Put your mouse pointer over “Support,” to bring up the support menu. Move down and click the “Downloads” option.

Step 2: Click the “Select a Product” drop down menu; choose “Power Vision CX”.

Step 3: Download and install the Dynojet Power Core Software.

Step 4: Download and save the firmware file to an accessible location on your computer (i.e. your desktop, a downloads folder, or a dedicated folder). The file will come in a “zipped” folder. The actual firmware file inside (with a .dfu filename extension) will need to be extracted before you can use it. Open the file with Windows Explorer. Click “Extract all files”. Follow the on screen prompts.

Step 5: With your Power Vision CX plugged in to your computer or vehicle, check your firmware number on the device by going to DEVICE TOOLS>DEVICE INFO>ABOUT and you will see the device firmware build number. If this number matches the firmware version number on the downloads page, your firmware is up to date. If it does not match continue installing the latest firmware version.

Step 6: Launch the Power Core Software. In the Application Launcher, click TOOLS>MANAGE HARDWARE. The window Device Manager will open and you will want to make sure on the left side of the window that Power Vision CX is selected.

Step 7: On the right side click INSTALL FIRMWARE, locate the extracted firmware file previously saved to the computer (the .dfu file) and open it. The update process will begin.

NOTE: If it is the first time updating the firmware, USB boot loaders will automatically install and may cause the updating process to timeout and stop. If you get any error messages, reboot your computer and try again. Make sure you see the “Update Completed” message at the end.

Step 8: Make sure the message UPDATE COMPLETED is shown. If you see this message, your Power Vision CX firmware is now up to date and you are ready to flash.
Watch our Power Vision CX Flash Tutorial to learn how to flash your vehicle with Dynojet’s pre-developed tune files

If you have any further questions feel free to use our contact form for Power Vision CX.

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Power Vision: 2017 H-D Support


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2017 PV

There are 2 new software levels that we’ve come across thus far, those being 723 (Touring) and 414 (Sportster, Street, Dyna…..except Dyna Low Rider S, which is 617).  We started reading these calibrations back on August 23rd and have been beta testing since.  A Power Vision loaded with the current, publicly released firmware will allow you to tune (and use the Tune License system) ALL 2017 H-D motorcycles EXCEPT those that use the 723 and 414  software levels.

Beta testing results thus far have been positive on the 723 and 414 software level bikes.  We continue to add additional tuning parameters to ensure the highest level of control possible.



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Follow the Leader…..New Power Vision Updates


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In our quest to offer the best possible tuning solution for H-D motorcycles we’re pleased to announce a few new features.  As always please be sure to use the PV Update Client to ensure you have the latest software, firmware, and tune database.


Last Public Version = PV_FIRMWARE-2.0.19-1506

New Public Version = PV_FIRMWARE-2.0.23-1526

Date Posted Live = 5/26/16



Last Public Version =

New Public Version =

Date Posted Live = 5/26/16



  • Automatically clears DTC’s and Adaptive Fuel Trims after you flash a tune
  • Added support for ECM software level 618 calibrations
  • Update Client can now be launched from within WinPV > Setup > Check for Updates


  • Info button on PV Tool Bar will now also check for updates and advise if it’s needed






  • Added 36 new calibration items, some of which are only available to Certified Power Vision Tuning Centers. Public items include:


Closed Loop Minimum MAP
Closed Loop Minimum MAP Hysteresis
Knock Control Minimum MAP
Knock Control Minimum MAP Hysteresis
Knock Control Minimum RPM
Knock Event Spark Retard Adder
Knock Event Spark Retard Adder VS RPM
Knock Spark Retard Removal Rate
Knock Spark Retard Removal Percentage
Knock Spark Retard Removal Percentage VS RPM
Left Fan Speed Enable
Left Fan Speed Disable
Left Fan Temp Enable
Left Fan Temp Disable
Left Fan Key-Off Time
Left Fan Key-Off Min Temp
Right Fan Speed Enable
Right Fan Speed Disable
Right Fan Temp Enable
Right Fan Temp Disable
Right Fan Key-Off Time
Right Fan Key-Off Min Temp


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VIDEO: Speed and Gear Calibration


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We uploaded a new video on our YouTube Channel! In this video we discuss the Power Commander 5 optional speed and gear inputs. We go over how to connect, configure, and calibrate these inputs. Check out the video below!



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Target Tune FAQ’s


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What is Target Tune? 

  • Target Tune is a product that uses a control module and 2 Bosch wideband AFR / Lambda sensors. It uses the existing closed loop, adaptive fuel control strategy in your Delphi ECM, but with changes made to the calibration to allow your ECM to use the wideband sensors. In order for the system to work, you must have a calibration flashed to your bike with the various edits required to make it work. At this time only a Certified Power Vision Tuning Center, or a Dynojet technical representative can make those edits.

So my ECM is now able to use wideband o2 sensors and fix-up my tune on the fly?

  • Yes, your ECM has now been transformed and is allowed to read and manage wideband o2 sensors, and more importantly, use them for closed loop control on your fuel table.

What should I expect?

  • Your bike will immediately run better once the various thresholds to allow closed loop fuel control are met, things like engine temp, etc. It will immediately run at the target AFR or Lambda defined in your calibration’s fuel table even if your VE tables are not perfect.

Once Target Tune is installed and I have the correct version of my calibration flashed, what do I do?

  • Enjoy the ride with newfound power and torque, and the satisfaction knowing you have the most sophisticated tuning solution available for Harley-Davidson motorcycles.

Can I make changes to my tune?

  • Yes, all the regular tuning parameters that are exposed to you in WinPV are still available.

So if I change the values in my fuel table, my bike will actually run at those AFR or Lambda values?

  • Yes. Your tuner, or Dynojet would have set up your fuel table for best results, but you can edit these values to suit your needs.

Why does Target Tune not seem to be working? Why I am getting errors on the bike after installing Target tune?

  • You have to be using the newest desktop software, firmware, and tune database for Target Tune to function. Using old versions of any of these will keep Target Tune from functioning.

Can I use the Target Tune module for the AutoTune process?

  • Yes, the Target Tune module will work for the AutoTune function. Be sure to select the correct mode, “Dynojet Target Tuner Wideband Kit” when starting an Autotune session.


Will Target Tune make adjustments in the tune that I can see?

  • No. At this point only those users with special credentials, like Certified Power Vision Tuners, can make the necessary calibration changes to make Target Tune function. That being said, unless you have these special credentials you will not be able to “see” the calibration changes in WinPV. Once the necessary edits are made to your calibration, and the Target Tune is fitted to the bike, you are ready to go. The ECM will use the information provided by the Target Tune system to make adjustments to the short and long term trim fields in the ECM of the bike, while you ride. These fields are not found when you look at the tune in WinPV.

How can I turn off Target Tune?

  • You can load a tune that doesn’t have Target Tune enabled, or you can use Quick Tune to turn off closed loop.

What is the adjustment range for Target Tune?

  • Target Tune can subtract 30%, and add 40% fuel to a tune. Your tuner can adjust these values if need be,

How can I tell if Target Tune is working?

  • At any given operating condition there is an AFR, or Lambda value the ECM is trying to achieve. Using the fuel table as a reference, you can simply monitor the real time AFR or Lambda on your Power Vision while riding, or create a datalog to verify. There are also other channels that can be monitored, or logged that would give you an indication that Target Tune is online and the ECM is using it accordingly.

How do I setup the channels?

  • Select “Datalog” from the main menu, then “Gauges”. Select the style of gauges you’d like to work by scrolling left or right. Tap the gauge to assign a channel, and the “Set Gauge Properties” dialog will appear. Tap the field that says “None” and then choose the source and the channel you’re interested in. You’ll also need to change from “Basic Signals” to “Advanced Signals” by tapping the “Change” button.


To monitor AFR or Lambda from the Target Tune:

  • Remember, with Target Tune fitted to the bike the wideband values are now part of the ECM’s internally calculated channels (Signal Source = Vehicle). When using Autotune Pro, the wideband values are external to the ECM and simply sent via the Dynojet CAN cable to the Power Vision (Signal Source = Dynojet).
  • Choose “Vehicle” from the “Select Signal Source” screen. You’ll see “WBO2 AFR Front” (and Rear), along with “WBO2 LAMBDA Front” (and Rear).


  • Like any “closed loop calibration”, the Closed Loop Integrator (CLI) should be active during normal riding conditions. This value should constantly swing up and down constantly, where the value of 100 is the “pivot point”. If you see a value of 103, that means the ECM had to add 3% to the respective front or rear cylinder VE table in order to achieve the target AFR or Lambda. Conversely, the value of 97 would indicate the ECM had to subtract 3% to the respective front or rear cylinder VE table in order to achieve the target AFR or Lambda. To view these channels, assign them to a gauge. You’re looking for “Front Closed Loop Integrator” and “Rear Closed Loop Integrator”.


  • If you have Adaptive Fuel enabled in your calibration, then you should also notice Adaptive Fuel Factor (AFF) change over time. These values will move, or change much slower than the CLI. Similar to the CLI values. If you see a value of 103, that means the ECM had to add 3% to the respective front or rear cylinder VE table in order to achieve the target AFR or Lambda. Conversely, the value of 97 would indicate the ECM had to subtract 3% to the respective front or rear cylinder VE table in order to achieve the target AFR or Lambda. To view these channels, assign them to a gauge. You’re looking for “Front Adaptive Fuel Factor” and “Rear Adaptive Fuel Factor”

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Do the Adaptive Fuel Factors get committed to my calibration?

  • No, however they are used by the ECM to calculate the final amount of fuel to be delivered at a certain operating condition. The AFF values are used by the ECM until you clear them via the Power Vision function “Reset Fuel Trim”. These values are effectively applied to the base VE tables in your calibration by the ECM, however they are NOT committed to the calibration itself. To properly “fix” your calibration, you would need to use the Autotune process and select the proper mode (“Dynojet Target Tuner Wideband Kit”).

How does Target Tune AutoTune process work?

  • Utilizing the Target Tune AFR data and other data from the H-D OEM data bus, the Power Vision can automatically fix the deviation between the AFR or Lambda as defined in the fuel table of your calibration and the actual AFR or Lambda by adjusting the VE tables. The data is learned in real time, but processing the data and adjusting the tune is done in an “offline state” (key on/engine off). After the data is collected, the Power Vision can process the data, correct the tune, and then re-flash the corrected tune into the ECM. You’ve effectively corrected the VE tables to ensure the AFR or Lambda you ask for (in your calibration) is what you get (as measured by the wideband o2 sensors). Once you exit the Autotune mode you’ll be back to using your full-time, Target Tune closed loop calibration.

What happens if there is a problem with Target Tune?

  • The OEM diagnostic system is still fully functional, and in the event there was an issue a DTC would be set. You can use the Power Vision to read the DTC like normal. If the module, sensor, or harness were to fail the ECM would transition into open loop, just like if your OEM narrowband sensor were to fail.

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Get on Target


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Dynojet’s new Target Tune is an exciting new product that can add a new dimension to your Harley-Davidson’s® ECM. When paired with a Target Tune specific calibration flashed by a Power Vision, your ECM will run closed loop fuel control based on wideband o2 sensors. The Power Vision delivered calibration changes the coding in the ECM to “understand” the wideband signal (from Target Tune) and allows the ECM to accurately achieve the target AFR. Dynojet has evolved the OEM closed loop, adaptive fuel control system on your Harley to meet the needs of performance enthusiasts.

Key Features:

  • Allows the factory ECM to interpret and use wideband o2 sensor signals*
  • Target fuel table from the calibration / tune is achieved in real time
  • Retains OEM closed loop, adaptive fuel control strategy
  • Learns and uses VE table corrections as you ride
  • Does NOT interfere with dealer diagnostic / service tools
  • Includes OEM style connectors to plug into factory o2 harness, either 2 or 4 pin versions
  • Fits 2007 and newer Harley Davidson® Bikes

* Requires Power Vision Target Tune specific calibration









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VIDEO: Dynojet Fuel Tuners


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At Dynojet Research, we offer 3 different ways to tune your vehicle. This video will give a brief description of each one of our fuel tuners. We have designated YouTube playlists for each of our available products.


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