Purple Sector

Analyse MyChron and AiM Solo .xrk files in your browser

Open a MyChron or AiM Solo 2 .xrk or .xrz session in your browser, compare laps with your quickest and see which corners cost time. No CSV export needed.

  • .xrk
  • .xrz

By Purple Sector. Published . Reviewed .

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MyChron 5Queensland Raceway National
A MyChron 5 session open in Purple Sector: the Queensland Raceway National map with its six turns and the gap at each, beside the list of laps.
Shown: a real MyChron 5 session at Queensland Raceway National. A file from any logger Purple Sector reads opens in the same view.

How do I get the session file from a MyChron or AiM Solo?

Bring: the session’s .xrk or .xrz file

On a computer

  1. In Race Studio 3 (Windows), click the Wi-Fi icon, pick your MyChron or Solo and click “Connect”. A MyChron 6 can also use its USB-C cable.
  2. Open the “Data Download” tab (“Download” on a MyChron 5 or Solo 2 DL), tick the session and download it.
  3. Open the .xrk from C:\AIM_SPORT\RaceStudio3\user\data here. No export is needed.
  4. No Windows? A MyChron can come off over its own Wi-Fi: choose “Download from MyChron (WiFi)” on your dashboard.

On a phone

  1. AiM’s RaceStudio 3 phone app shares to AiM Cloud and FASTLAP only, so get the file on a computer.
  2. On Windows, download the session in Race Studio 3. On a Mac, choose “Download from MyChron (WiFi)” on your dashboard.

Watch out: Bring the session file, not a Race Studio report or a one-lap CSV.

Vendor instructions: AiM Race Studio 3 manual

What else should I know about the file?

Limits to know
  • Race Studio 3 runs on Windows only; a Mac needs Purple Sector Link or a virtual Windows.
  • On Windows 11 24H2, Race Studio 3 may not see the logger’s Wi-Fi until Location is turned on.
  • A Race Studio 2 logger (MyChron 4 and older) saves a .drk: open it together with the .gpk and .rrk of the same name for the map.
  • It opens with the logger’s laps and GPS speed; its other channels need a Race Studio CSV export.
  • Race Studio summary tables cannot be opened.
Do I need Race Studio to open an .xrk file?

Not to open it here: Purple Sector reads the .xrk or .xrz as it is. Getting the session off the logger is a separate step. A MyChron 5, 5S or 6 can be downloaded over its own Wi-Fi with Purple Sector Link, a small free app for Mac or PC. A Solo 2, or a MyChron you already download with Race Studio 3 on Windows, goes through Race Studio 3 as usual.

Which AiM files will not open?

Race Studio summary tables cannot be opened. A Race Studio 2 .drk opens with the logger's laps and GPS speed; open it together with the .gpk of the same name for the track map. Its other channels need a full-session CSV export from Race Studio.

Can I analyse MyChron data on a Mac?

Yes: once you have the .xrk or .xrz session file, open it in Purple Sector in your browser. Downloading from the logger is a separate step. Purple Sector Link has been tried with a MyChron 5 on a Mac; see the limits above before relying on a different device or operating system.

Should I use the original XRK file or export a CSV?

Use the original .xrk or .xrz when available: it preserves the logger’s recorded channels and lap records without an export step. A full-session Race Studio CSV is another supported route. A lap summary or screenshot does not contain the recorded samples needed for a telemetry comparison.

What do I see once the file opens?

Lap 6 picked against lap 1: the gap to lap 1 at every turn on the map, T3 the largest at +0.87 s.
The gap to your best at every turn.
The map closed on T3, marked +0.87 s, with both laps' lines through the corner.
The corner that cost time, with both lines.
The AI Coach card for T3, +0.87 s: “Turn in about 2 m wider into T3 and get back on the throttle about 3 m sooner out of it.”
One card for that corner, with its numbers.

See how to read the speed and time difference in a worked lap comparison at Norwell, using a public sample recording and its stated evidence limits.

How to compare laps · Circuit maps

Next: MyChron software and apps · AiM Solo 2 software and apps · How to read AiM Solo 2 data · XRK to CSV · Race Studio 3 on a Mac · How to read MyChron data · Kart data loggers compared

Popular circuits: Mount Panorama · Phillip Island · Sydney Motorsport Park · The Bend Motorsport Park · Albert Park Grand Prix Circuit · Adelaide Street Circuit · Lakeside Park · Calder Park Raceway · all circuit maps.

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