Dragy Moto Lab is the home of Chainline, a web app for motorcycle gearing and performance testing that runs in your browser.

At its core is the gearing bench: pick a sport bike, change sprockets and see what happens to speed in every gear, roll-on times, chain length and power to weight. The lab tools sit alongside it: a phone GPS timer, a Times lab that corrects Dragy and phone times for weather and weight, Spark for estimated ignition timing, and live Weather with density altitude.

The lab’s advice is simple: change one thing at a time, and compare corrected numbers before you chase a new part.

Chainline is not affiliated with Dragy Motorsports or any motorcycle manufacturer.