Why is there a watery substance in my exhaust pipe?

Seeing moisture at the end of your exhaust can be surprising, but it's not always a sign of trouble. Here are the most common causes, listed in order of likelihood:

1. Contaminated or Poor-Quality Fuel

You may have filled up with fuel that contains excess moisture or has lost its oxygen content (e.g., due to ethanol evaporation). This can create a richer-than-normal fuel mixture, leading to incomplete combustion and condensation in the exhaust.

What to do: Run your current fuel tank as low as possible, then refill from a different, high-quality fuel station.

2. Dirty Fuel Injectors

Clogged or partially blocked injectors can affect spray patterns, resulting in poor atomization. This can cause unburned fuel to pass into the exhaust, mixing with condensation and appearing as a watery substance.

What to do: Use a high-quality fuel injector cleaner such as Wynn’s Power Charge to clean your injectors and fuel system.

3. Worn or Fouled Spark Plugs

Old or degraded spark plugs can cause incomplete combustion, leading to excess fuel and moisture buildup in the exhaust.

What to do: Replace your spark plugs if they haven’t been serviced recently. Even modern bikes benefit from fresh plugs now and then.

4. Power Commander Map Issues

A corrupted or outdated map can cause overly rich fuel conditions. This is rare but possible if map settings have been unintentionally changed.

What to do: Submit a Map Support Request to receive the latest map for your setup.

Note: A small amount of condensation in the exhaust—especially on cold starts or cool days—is normal and usually nothing to worry about. But if the issue persists or is excessive, reviewing the above items is a good idea.