Triumph Speed 400 Tuning
1 supported Triumph Speed 400 application, 2023+.
Triumph
1 supported Speed 400 tunes
Triumph Speed 400
400cc
40 HP stock / 27 lb-ft
2023+
- Controller
- Engine (ECU): Keihin KTKSv2
- Flash method
- OBD port
AutoTunerBook a tune
All Supported Triumph Speed 400 Tunes
| Engine | Years | Version | Stock power | Controller | Platform |
|---|---|---|---|---|---|
| 400cc | 2023+ | 40 hp | ECU Keihin KTKSv2 | AutoTuner |
Other Triumph Models
About Triumph Speed 400 tuning
Rapid Racing supports 1 Triumph Speed 400 application from 2023+ through AutoTuner, with stock outputs up to 40 hp. Every calibration is built for your exact engine, fuel, and modifications, then verified on our Dynojet 424xLC2 in Jenison, MI, serving Grand Rapids and West Michigan.
Supported engines: 400cc.
Supported controllers: Keihin KTKSv2.
Don't See Your Vehicle?
These lists cover off-the-shelf tuning platforms. We also do standalone ECU installs and custom calibrations, so reach out and we'll tell you what's possible for your build. Compatibility data last updated 2026-09-24.