What Is Decel Pop on Motorcycles and How to Fix It
Many riders ask: What is decel pop? You’ve probably heard it after upgrading your exhaust or intake. That loud crackle during deceleration isn’t just noise—it’s a sign your motorcycle’s fueling needs attention.
Decel pop, short for deceleration popping, happens when unburned fuel ignites in the exhaust system. Instead of burning inside the combustion chamber, the leftover fuel burns when it hits the hot exhaust pipes. The result is a popping sound when you roll off the throttle.
Why Does Decel Pop Happen?
Decel pop often shows up after adding a new exhaust or intake. These changes increase airflow but alter your bike’s air-fuel ratio. When the fuel mixture runs too lean, unburned fuel slips into the exhaust. This is where the pop begins.
Other factors can make it worse:
Exhaust leaks at the head pipes or mufflers
Aftermarket slip-ons without proper tuning
Aggressive engine braking combined with lean fueling
As you can see, decel pop usually ties back to airflow and tuning.
How to Fix Decel Pop
The good news: fixing decel pop is straightforward with the right tools. A fuel tuner, like the Dynojet Power Vision, adjusts the air-fuel ratio for your setup. With proper tuning, you’ll eliminate the excess unburned fuel that causes popping.
Steps to resolve the issue:
Inspect for exhaust leaks and repair them first.
Install a fuel tuner such as the Dynojet Power Vision.
Load a proper map or create a custom tune.
Test ride and fine-tune for smooth deceleration.
For a full walkthrough, watch our video:
PDF Walk through: https://university.fuelmotousa.com/wp-content/uploads/PowerVision_FIXING_DECEL_POP.pdf
So, what is decel pop? It’s the byproduct of lean fueling, usually after performance mods. The fix is proper tuning. With the Dynojet Power Vision, you’ll restore smooth throttle response, eliminate the annoying pop, and enjoy a stronger ride.