First job with the injection system was already made when the project went from Sportster to Bigtwin. Buying the EFI system.
I bought the system for the Sportster but when I ordered it I bought another wireharness. Just in case for the Bigtwin and that day came faster that expected.
I went for the DIY open source EFI system, Megasquirt.
This system have a quite large ECU so I went for the already assembled smaller version, Microsquirt.