Best Auto Tuner for Harley Davidson: Optimise your Fuel Management


A motorcycle’s air-fuel ratio and timing are essential to keeping it running at optimum levels. 

If both of these elements aren’t right, your speed, power output, and mileage can all be affected. Getting a tuner for your bike will provide the careful management needed to keep everything as it should be. 

Upgrading a Harley is one of the first things owners do after it rolls out of the dealership. However, putting performance parts on your Harley without managing your air-fuel mix is a recipe for disaster, which is why a good tuner is a must in these circumstances. 

Here are our top tuners for Harley motorcycles.

Best Harley Auto Tuner – Quick Picks

Dynojet Power Commander V: Best Overall
Cobra Fi12000R: Best Value
Dynojet Power Vision: No apps required
Juice Box Gen 4: Best for Simple Install
Vance & Hines C.A.R.B Fuelpak: No app or computer required

Reviews of the Best Harley Tuners

Top Pick
Dynojet Power Commander V Dynojet Power Commander V

The Dynojet Power Commander V offers a wide range of downloadable maps with combinations for a large range of models and accessories. 

If there isn’t a map combination that works, you can develop a custom map for your bike specifically, but this should be done with the help of a dyno. 

The Dynojet PCV can adjust the map for each gear, RPM, and throttle position.

The detail in which the PCV’s fuel mapping takes place makes it suitable for all sorts of riders. 

If you ride into the city for your commute, you will benefit from low-down torque. If you are a racer, where smoother power delivery and top-end is most necessary, the PCV can adjust to all your needs.

You can also buy a map switch separately so that, with the touch of a button, you can switch between two different maps as you ride. 

The Dynojet C3 mobile app allows you to connect the Power Commander V to see data live and make the necessary changes to get your air-fuel mix exactly right for each situation. 

One important note is that the Power Commander V is incompatible with Apple Mac software.

Installing the PCV is a little bit complicated, and it’s a fiddly job to make sure everything is as it should be. 

The unit does come with instructions, so just take your time and follow the installation guide.

  • Maps for either optimal MPG or power
  • Mobile app connection
  • Large database of free customizable maps
  • Option for a custom map built for your needs
  • 10 customizable throttle positions
  • Slightly complicated installation process
  • Software compatibility limited to Windows PC
Best Value
Cobra Fi2000R Fuel Tuner Cobra Fi2000R Fuel Tuner

The Cobra Fi12000R is a slightly different device than others on the list because it’s a piggyback device, which means your settings get removed when you disconnect the device and plug your factory connectors back in. 

You’ll like how simple to install and use the Cobra is. It removes the complicated technology often associated with auto tuners and other electronics.

You can adjust the fuel delivery using three different parameters, each with 10 settings. It’s an easy and precise way of ensuring your bike is tuned to fit any new performance parts. 

The Fi2000R will even suit those who are used to dealing with carbs and working with jets. As the tuning system should feel familiar despite everything now being done electronically.

At the end of the day, the Cobra is a great value and will do everything you need it to do.

  • Harley specific
  • Easy installation
  • Good value
  • Fewer settings than other units
  • Piggyback unit—needs to stay on your bike to run new maps
No App Required
Dynojet Power Vision Dynojet Power Vision

We have another entry from Dynojet and this one is specifically made to work with any Harley Davidson motorcycle that is fuel injected and fitted with the Delphi ECM. 

The biggest difference between the Power Commander V and the Power Vision is that you don’t need a mobile app or a computer to use the Power Vision. 

It features a full, color touch screen on which you can navigate all the commands needed and configure your bike’s settings how you want. 

The Power Vision is equipped with a built-in Auto-Tune Basic Mode for optimizing your fuel settings mid-ride. 

The unit downloads and stores your stock fuel map and settings, then you can select up to six different tunes to be stored on the device, ready to be flashed to your bike. 

Dynojet has ensured the unit also provides useful information, such as MPG, speed, air/fuel ratio, etc., while your bike is running so you know everything is as it should be. 

  • No computer or mobile app necessary
  • All settings accessed by touch-screen display
  • Hundreds of dyno tunes to select from
  • Original stock tuning saved for future use
  • Harley-specific model
  • Expensive
Simple Plug and Play
Two Brothers Juice Box Fuel Controller Two Brothers Juice Box Fuel Controller

The Juice Box Gen 4 is another piggyback unit that is a simple plug-and-play device with no dyno-tuning required. 

There are dyno-tuned maps already downloaded onto the device, ready to select and get your bike running as optimally as possible.

The fuel controller is best suited for those who want to keep things as easy as possible but know that they need to modify the bike’s tuning to accommodate performance parts. 

The instructions are clear and will guide you through the install and setup process as well as let you know what you need to do to get your bike’s fuel mapping right. 

  • Good value
  • Plug and play
  • Simple installation and use
  • Limited tuning options
No App Pick
Vance & Hines C.A.R.B. Fuelpak For Harley Vance & Hines C.A.R.B. Fuelpak For Harley

The Vance & Hines C.A.R.B Fuelpak for Harley is a straightforward unit that plugs straight into your motorcycle’s wiring harness and ECU using a T-tap and OEM connectors. 

The idea behind the Fuelpak was to make installation as easy as possible so you can get down to the important jobs quicker. 

At the touch of a button, you can tune the fuel mixture throughout the rev range. It works using a throttle position, sensor-based system, which aims again to simplify the process. 

No apps or computers are necessary; just input the details and you’re good to go. 

The system is designed to increase power and throttle response, which is generally the two things we want when we start adding performance exhausts and air filters to our bikes. 

The values supplied are based on Vance & Hines exhaust systems. However, the Fuelpak can also work with other branded exhausts. Just need to contact a V&H tech to get the correct values. 

  • Easy installation to the bike’s wiring harness and ECU
  • Throttle position sensor-based system
  • Works with and without non-V&H exhaust systems
  • No computers, apps, or anything else needed
  • California regulation approved
  • Supplied values for data are for V&H only
  • Quite a bulky unit

Buyers Guide

Considerations and Cost

When it comes to buying a tuner for your Harley, there are some important things you need to think about so that you get the right one for your needs. 

Here are my top tips for buying a tuner for your Harley Davidson:

First of all, if you’re making performance upgrades, get one

A tuner is a device that adjusts the air-fuel mix and ignition timing of your bike. The adjustments are made to accommodate any modifications you have made, specifically performance based parts such as a new muffler and airbox. 

The adjustments ensure that your bike is running efficiently and not causing any excess wear and tear on your internal components. 

Essentially, a tuner will keep your bike happy and healthy for longer. 

The added bonus is that along with your new parts, you should see a boost in both performance and/or fuel efficiency. 

Many riders don’t need a tuner for their motorcycle, as they leave their bikes stock and don’t make any serious modifications that affect the bike’s performance. 

However, Harleys are notorious for being customized almost as soon as they leave the dealer, with exhausts being one of the most common modifications. 

Read about the best performance exhausts for Harleys.

If you are making changes (not just cosmetic) to your bike then you should get a tuner. It is a small investment that keeps your bike fighting fit and performing to its optimal level. 

Make sure it’s compatible with your bike 

Before you buy a tuner, make sure it’s compatible with your motorcycle model. 

Revzilla is pretty good at putting up a full list of bikes that each tuner is compatible with and if you’re in doubt, make sure you ask the question first. 

You can also speak to your local Harley dealer, who will advise you on both whether you need a tuner and whether a certain one will work for your motorcycle. 

Get one that’s easy to use

Some tuners are easier to install and navigate than others. Some require a computer or a mobile app, others are fully independent with a touch screen, and some are less tech-based and are simply plug-and-play units with push buttons for the settings. 

Be sure to go for a device that you are confident in installing and using. 

The benefit of a device like the Power Commander V is that you have full access to hundreds of downloadable maps that can then be installed on your bike using the unit. 

Once plugged into your computer, you can also build custom maps to suit your specific bike with its specific custom parts that you have added. 

Some tuners, like the Fuelpak FP3 have built-in auto-tuners that, if left plugged into the bike, will adjust your bike’s air/fuel ratio on the fly to make sure it’s running properly at all times. 

You can also switch between maps on the go with this kind of tuner, which is awesome for riders who ride in different situations regularly, for example, commuting around the city and then going on long, fast highway rides. 

Piggyback devices

Piggyback devices, such as the Cobra Fi12000R, are the most simple units to use, but they have to be left on the bike to maintain your settings. The main downside of tuners like this is that there are fewer custom options available and fewer in-depth settings available. 


There you have it—everything you need to pick the right tuner for your Harley.

The number-one best choice is the Dynojet Power Commander V. It’s really hard to beat in terms of the features it is loaded with and the hundreds of settings to pick from. 

If you need something a bit more simple, you can’t go wrong with the Cobra Fi2000R. It will do the job well at a great price.