The Tune Bench guides

Tuning Library

Learn what your tune changes, what your data can tell you, and which tools fit the bike you ride.

Latest articles

Compare learned fuel corrections across similar rides before deciding whether to write them into your ThunderMax map.

Identify the damaged end, match the exact connector, and confirm the pinout before ordering parts for a harness repair.

Understand what a tune changes and how to choose a tool.

Record your starting point, check the bike, and decide what you want the tune to improve.

Separate the mixture the ECU asks for, the mixture a sensor reports, and the air the ECU estimates.

Three ways to change how a motorcycle runs, plus what to check before you buy.

Collect useful data and compare results under similar conditions.

Choose the channels that match your question and provide enough context for a fair comparison.

Find where power and torque change, and know when two pulls can be compared.

See what each system does and check the exact fit for your bike.

Understand what the phone-based flash tuner does and where wideband hardware fits.

How the desktop software, interface, bike-specific definition, and logging hardware fit together.

What the FP4 phone app does for supported Harley-Davidson motorcycles and what to verify first.

How a replacement ECM uses wideband feedback, and how to find the right kit for your Harley.

Explore the Impact ECU for Harley Touring bikes and the difference between an ECU kit and a wiring repair part.