Yamaha XT660
- ECU
- 5VK-8591A-01
- ECU maker
- —
- Model years
- 2004-2007
- Stock firmware
- Included · 58 KB
What you can tune
9 calibration tables · 0 scalars · 0 patches & flags — all editable in the browser.
Getting started
Start from the included stock firmware, or upload your own BIN read.
Heat-mapped tables, editable 2D/3D graphs, cell math, AI auto-tune, and compare against other reads.
Download a standard modified BIN and flash it with your own hardware and software.
Calibration maps
| Map | Group | Tables |
|---|---|---|
| MAP 1 | Fuel | 1 |
| fuel # | Fuel | 2 |
| RPM limiter fuel | Fuel | 1 |
| Ignition # ? | Ignition | 2 |
| TPS TABLE | Throttle / ETV | 1 |
| Fan Temp | Temperature | 1 |
| RPM TABLE | Other · General TABLE | 1 |
MotoEditor edits the calibration and exports a standard BIN — reading and flashing the ECU is handled by your own flashing hardware and software.
Frequently asked
What can I tune on the Yamaha XT660 2004-2007?
This verified definition exposes 9 calibration tables — including fuel, ignition, throttle, other · general table and temperature maps — plus 0 adjustable scalars and 0 feature patches, all editable in your browser.
Do I need to remove or open the ECU?
No. MotoEditor edits the calibration and exports a standard BIN. Reading the stock file from the bike and writing it back is done with your own flashing hardware and software.
Which ECU does this Yamaha XT660 definition cover?
The 5VK-8591A-01. Every map address and scaling is verified against the stock firmware, so what you edit matches the real calibration.
Can I use my own stock file?
Yes. Start a project from your bike's stock BIN and your changes apply to it, or begin from the built-in reference — either way you export a standard BIN.
How much does access cost?
MotoEditor is a single subscription that unlocks the browser editor for this definition and every other bike in the library — no per-project or per-download fees.