The Power Commander is made in a way that it latches on the fuel injector cable without even cutting it and the other feed is for the battery, pretty simple and it's design does not affect the warranty.

Also it is interesting to appreciate that the engineers who designed the PC would have surely made their home work and obtained the green light from the motorcycles manufacturers before investing in the production of it and obviously Dinojet would have not invested in it if they beleived their product was to be considered as "oultwawed" bike the big chiefs.