I know things... A lot of things.
Join Date: Feb 2015
Motorcycle: GSXR 750 K4
Re: Bizarre cut-out
No, unless the interlock behaves differently in pre-K models, which is not the case, as far as I remember, the bike should start just fine even in gear, assuming the sidestand switch is down. My assumption is, that whatever was done when installing the gear indicator, particularly the wiring modification made to power it, which seems to have been made after the engine stop switch, has caused power to be lost downstream of it. It might also be, that it's barely receiving power itself, causing the erratic behavior.