M8FI Gen 9 is a plug-and-play EFI system for 2021–2023 Harley-Davidson® M8 models. This integrated ECU includes Auto-Tune, Alpha-N Fuel Control, USB-C, and Wide-Band O2 Sensor Support.

M8FI Gen 9 Harley Fuel Injection Controller (Integrated)
For 2021–2023 Harley-Davidson^® M8 Models and the 2024 Ultra

 RACE USE ONLY:  Not legal for sale or use in California or on any pollution-controlled vehicles.

The M8FI Gen 9 Harley Fuel Injection Controller is a fully integrated, professional-grade plug-and-play ECU engineered for closed-course competition in the King of the Baggers series. It offers a complete EFI and ignition control solution for highly modified V-Twin engines.

Notably, the M8FI ECU solves tuning challenges caused by long-duration cams and unstable MAP signals using advanced Alpha-N strategy. In addition, built-in wide-band control and USB-C connectivity reduce complexity and wiring. As a result, the M8FI Gen 9 is the most advanced Harley EFI solution available.

 Key Features of the M8FI Gen 9 Harley Fuel Injection Controller

•  Fully reprogrammable replacement ECU
•  Alpha-N fuel control (RPM + TPS) – unaffected by long duration/high overlap cams
•  Auto-Tune included – wide-band Bosch LSU 4.2 sensors for both cylinders
•  Integrated Design – wide-band controller and USB-C interface built into the ECU
•  Continuous data logging – 60 minutes at 10 samples per second
•  Windows tuning & logging software (XP through 11)
•  3D tables for fuel & ignition; 2D for idle and enrichment
•  User-configurable I/O – nitrous control, RPM limit, shift kill (in between gear, for air shifters), and more
•  Integrated Support for Cruise Control
•  Billet aluminum housing with black anodized finish
•  Plug-and-play harness and installation
•  RDRS Compatible 

 ECU Configuration Options

• 1 Bar Naturally Aspirated (105 kPa) – Utilizes the OEM MAP Sensor

• M8FI Gen 9 ECU with integrated wide-band and USB-C
• Bosch LSU 4.2 wide-band O2 sensors (front & rear)
• USB-C programming cable
• Installation & tuning guides (PDF + video)
• Access to PC_LINK & TCFI_LOG software

 Software & System Requirements

• PC_LINK v23.6+ for tuning
• TCFI_LOG v19.99+ for logging and diagnostics
• Compatible with Windows XP, 7, 8, 10, 11
• Free download & demo mode available