Before your first tune

Start with a symptom you can describe

A useful goal is specific. “The bike hesitates as I roll on from steady cruise” gives you something to reproduce and measure. Write down whether the engine is cold or warm, the gear and RPM range, and how much throttle you were using.

If a problem appeared after a parts change, record the installation date and what else changed at the same time. A tune is easier to evaluate when the hardware, fuel, and test conditions are known.

Make a baseline

• Write down the year, model, engine, ECU or calibration ID if available, and the intake, exhaust, cam, and fuel you use.
• Check for fault codes, leaks, and loose connections, especially around anything recently installed. Resolve mechanical issues before trying to tune around them.
• Save the current calibration or recovery file if your tool supports it. Check the manufacturer’s instructions for restoring it before making changes.
• Record a baseline log or dyno run and label it with the tune version. Keep the original file.

Change one thing you can measure

Pick the change that addresses your goal. Label the new file and repeat the same test under comparable conditions. Keep a note of both improvements and side effects, such as a change that cleans up warm throttle response but makes cold starts worse.

When you post at the bench, include the baseline, the change, and the result. If you don’t know which change helped, say so. That lets other riders separate your observations from your interpretation.