Help Guide: The difference between Auto tune and Remap
Here's what to know about remap or ECU tune after fitting an aftermarket exhaust
Upgrading your motorcycle with an aftermarket exhaust is one of the best ways to improve sound, appearance, and performance, but one of the most common questions riders ask us at Hitchcox Motorcycles is:
"Do I need a remap or ECU tune after fitting an aftermarket exhaust?"
The answer depends on one key thing.
Does the Catalytic Converter (CAT) Stay or Go?
Whether your bike needs a full remap after fitting an aftermarket exhaust comes down to how much the exhaust flow changes after installation.
Keeping the CAT: Slip-On Aftermarket Exhausts
If you're fitting a slip-on aftermarket exhaust or any setup that keeps the factory catalytic converter in place, most modern motorcycles can adapt automatically without needing a full ECU remap.
Because the CAT is still installed, the change in exhaust flow is relatively small, allowing the ECU to make its own minor fuelling adjustments using the bike's onboard sensors. In most cases, all that's needed is a simple ECU auto-adaptation procedure.
Triumph Exhaust Auto-Tune: The 15-Minute Procedure
After fitting a Triumph exhaust while retaining the CAT, Triumph recommends the following process:
- Start the bike without touching the throttle
- Allow the bike to idle until the cooling fan comes on
- Once the fan starts, leave the bike running for 15 minutes
- Turn the bike off
- Restart the bike
At this point, the ECU will have re-learned the new setup and adjusted itself accordingly. This Triumph exhaust auto-tune process helps the bike adapt to the slight change in airflow and is usually all that's required for CAT-retaining systems.
What the Triumph Exhaust Auto-Tune Does
The ECU adaptation process can help:
- Smooth throttle response
- Adjust fuelling slightly
- Improve rideability
- Reduce hesitation
- Allow the bike to adapt to minor airflow changes
For bikes keeping the original CAT in place, including many Hitchcox Motorcycles exhaust fitments is typically sufficient. Enjoy the upgrade!
Removing the CAT: Full Aftermarket Exhaust Systems
If you're fitting a full aftermarket exhaust system or removing the catalytic converter entirely, the situation changes significantly.
Without the CAT, exhaust gases flow much more freely, which alters the bike's fuelling requirements far beyond what the standard ECU auto-adjustment can compensate for. In these cases, a proper ECU remap is strongly recommended.
Why a Remap Is Essential After a Full Hitchcox Motorcycles Exhaust Fit
Running a full aftermarket exhaust system without appropriate tuning can lead to:
- Lean fuelling
- Jerky or snatchy throttle response
- Flat spots in the power delivery
- Excessive popping on deceleration
- Warning lights or dash error messages
- Reduced ride quality
A professional remap ensures the fuelling and ignition settings are correctly matched to your new Hitchcox Motorcycles exhaust system.
Benefits of a Professional ECU Remap With Your Aftermarket Exhaust
A correctly mapped bike running a quality aftermarket exhaust will generally:
- Run smoother
- Deliver cleaner throttle response
- Produce more consistent power
- Improve overall rideability
- Eliminate unnecessary fault codes
- Get the absolute best performance from the exhaust system
Our Recommended Tuning Specialist for Aftermarket Exhaust Remaps
For bikes requiring a remap after fitting a Hitchcox Motorcycles exhaust or any aftermarket exhaust system, we recommend Dave Wood Racing.
They're local to our workshop, and Dave is familiar with our exhaust systems, so he'll be able to get your bike running exactly as it should.
Quick Summary: Do You Need a Remap?
| Exhaust Setup | Remap Required? |
|---|---|
| Slip-on exhaust with CAT retained | Usually no: perform the 15-minute Triumph exhaust auto-tune |
| Full system with CAT removed | Yes: professional remap strongly recommended |
Need Advice on Your Hitchcox Motorcycles Exhaust?
If you're unsure whether your setup retains the CAT, or whether your bike would benefit from tuning after fitting an aftermarket exhaust, feel free to contact Hitchcox Motorcycles Exhausts and we'll be happy to help.
