Dynojet 2021 Harley-Davidson Power Vision 4

This is the Dynojet Power Vision 4, specifically designed for your 2021 Harley-Davidson motorcycle. It's a handheld tuning device that lets you upload custom maps to your bike's engine control module (ECM) to change how it runs. If you've made modifications like a new exhaust or air intake, this tool helps you get the most out of them by optimizing the fuel and ignition timing for your specific setup.

The Power Vision 4 is well-built and features a bright, easy-to-read color touchscreen. It comes pre-loaded with a selection of maps, but its real strength is its ability to load custom tunes created by professional tuners. This means you can get a map tailored precisely to your bike's modifications and your riding style, which can lead to improved throttle response, more power, and better overall engine performance. It also has the capability to log engine data while you ride, which is incredibly useful for diagnosing issues or for a tuner to analyze your bike's performance.

When you get this tuner, you'll want to make sure you have the latest software updates from Dynojet. It's a straightforward process to connect it to your bike and upload a tune. Remember to always back up your original ECM map before flashing a new one, just in case you need to revert.