Tuners

Harley-Davidson tuners are electronic fuel-management devices used to modify, monitor or refine the motorcycle's EFI calibration. The range includes Harley-Davidson fuel tuners, EFI controllers, Power Commander units, Power Vision flash tuners, fuel processors, engine control modules and auto-tune systems from Dynojet, Daytona Twin Tec, Fi2000, Thunder Heart Performance, ThunderMax, Vance & Hines and other manufacturers. Dynojet describes Power Commander as a fuel tuner that adjusts fuel delivery, while Power Vision provides ECU calibration and tuning functions.

The product selection covers Harley-Davidson Power Commander, Power Commander V and 6 units, Power Vision 3 and Power Vision 4, Power Vision shop tuner kits, EFI fuel processors, Twin Tuner controllers, TCFI modules, engine management systems and auto-tune equipment. Additional products include Harley-Davidson auto-tune kits, target-tune modules, wideband air/fuel ratio systems, oxygen enrichment devices, interface cables, tuning mounts and related EFI accessories. These products support different approaches to fuel adjustment, engine management, data monitoring and automated tuning.

The category also includes tuning solutions for different Harley-Davidson EFI generations and motorcycle platforms, from earlier Delphi and J1850 systems to CAN-bus applications and newer Milwaukee-Eight models. Harley-Davidson EFI tuners can be used as standalone tuning devices, piggyback fuel controllers, ECU management systems or components within a broader tuning setup. Power Commander, Power Vision, Fi2000, Twin Tuner, ThunderMax and other systems provide distinct methods for managing fuel delivery, ignition settings, air/fuel ratios and engine calibration.