Glad to hear you got it up and running.
Far as i'm aware, the potential running issue is down to one wire not returning a signal to the ECU, but only in some cases, it seems (MAY be the ground (black 10))
I've still got this diagram for the wiring i made after consulting the Fazer workshop manual, a LOT of googling and also the Koso manuals. May be of some use to either yourself, or anyone else who lands here after searching on google.
Other than that; I intended to make the change reversible by adding connectors or a wiring block between the loom and the Koso wiring. Never did do the mod, but at least some of the ground-work may be useful to others.
...Though i'm thinking of doing similar to my VFR at some point