Motorcycle Remap vs Tuning Module

A remap rewrites the software inside your bike’s own ECU. A Power Commander is a separate fuel injection tuning device made by Dynojet which, in Dynojet’s words, “optimizes your air/fuel ratio without directly changing the ECU”. Both are used to adjust fuelling, especially after an exhaust or intake change. They differ in where the change is made.

In short

A remap changes the factory ECU’s own maps; nothing extra is fitted to the bike.
A Power Commander is an add-on module. Dynojet says it adjusts fuelling, and on the Power Commander 6 the timing curve where applicable, without directly changing the ECU.
A remap can change settings that live inside the ECU, such as throttle response curves and torque limiters.
Dynojet says the Power Commander V can be uninstalled to go back to factory default settings.
Which suits you depends on what you want to change and whether you’d rather leave the ECU’s software as it is.

What is a remap?

A remap changes the settings in the ECU itself, so we can adjust any engine parameter we need to; what is motorcycle remapping? explains what the ECU controls. On a Harley-Davidson, for example, we remap the factory ECU through its diagnostic port.

All of our remaps are developed by our in-house team of map writers. We don’t use base maps from other companies. We log the bike on our Dynojet 250i with our own lambda sensors, in every riding mode it has, and write the map from what we measure. Our guide to how we develop bike remaps covers this step by step.

What is a Power Commander?

The Power Commander is Dynojet’s range of fuel controllers. We describe it here using Dynojet’s own published information:

Dynojet calls the Power Commander 6 a “fuel injection tuning device” that “allows you to optimize your fuel and timing curve (where applicable)”.
It describes the Power Commander V as optimising “your air/fuel ratio without directly changing the ECU”, with a fuel change range of -100% to +250%.
The Power Commander V is “upgradeable with additional features such as auto-tune and launch control”, and Dynojet says it can be uninstalled “to revert back to factory default settings”.
Dynojet’s Autotune accessory “automatically keeps your air/fuel ratio at your optimal settings and more”.
Dynojet sells separate fuel controllers for ATVs, UTVs and dirt bikes.

Side by side

	ECU remap	Power Commander (from Dynojet’s description)
Where the change is made	In the factory ECU’s own software	In a separate module, “without directly changing the ECU”
What it can adjust	The settings the ECU controls, from fuelling and spark advance to throttle response curves and torque limiters	Fuel and timing curve “where applicable” (Power Commander 6); fuel change range of -100% to +250% (Power Commander V)
Hardware added to the bike	None	The module, plus optional add-ons such as Autotune
Ongoing fuel correction	The ECU’s own lambda requests and closed loop monitoring, which a remap can recalibrate	Optional Autotune accessory
Taking it off	Standard software is written back to the ECU.	Dynojet says it can be uninstalled to revert to factory default settings

Which should you choose?

Start with what you want to change.

If you want more than fuelling. Throttle response curves, torque limiters and the ECU’s own lambda requests are settings that live inside the ECU. A remap is how we change them. This matters because many bikes leave the factory with restricted throttle opening or torque limiters in the mapping, which we often find when we log a standard bike on the dyno.

If you’d rather not change the ECU’s software. That is what the Power Commander is designed for: Dynojet describes it as working without directly changing the ECU, and as removable.

If you’re fitting an exhaust or intake. Both routes are used to correct fuelling for new parts. Our advice is to remap whenever an aftermarket exhaust or intake is fitted, and our bike page puts the cost point simply: remapping saves the expense of buying a tuning module or “piggy back ECU”. There’s more on this in our guide to remapping after an exhaust.

What a remap has done on bikes we’ve developed

On our BMW R1200GS a remap smoothed power delivery, and on our Harley-Davidson Iron 883 it corrected the fuelling for an aftermarket exhaust and open air filter; the results from both are in how we develop bike remaps.

How to get a remap

You can have your bike remapped at our Burnley workshop, at home with our ECU Flasher, or by sending us the ECU; remap your bike at home explains each route.

Talk to us

Find your make in our motorcycle remap finder or call 01282 779 000 to talk through your bike and what you want from it. We offer a free consultation to discuss your needs. ECU Flashers are available from the BHP UK shop.

Frequently asked questions

Is a Tuning module such as Power Commander the same as a remap?

No. Dynojet describes the Power Commander V as optimising the air-fuel ratio without directly changing the ECU. A remap changes the software inside the ECU itself.

Can a Power Commander adjust ignition timing?

Dynojet says the Power Commander 6 lets you optimise your fuel and timing curve where applicable, so it depends on the model and the bike. Check Dynojet's information for your machine.

Does a remap need any extra hardware on the bike?

No module is added. The new map is written into the factory ECU, either at our Burnley workshop, at home with our ECU Flasher, or with the ECU sent to us, depending on the model.

Do I need a remap or a fuel module after fitting an exhaust?

Both are ways of correcting fuelling for new parts. Our advice is to remap whenever an aftermarket exhaust or intake is fitted, so the ECU's own maps match your bike.

Last updated 19 October 2026