I'm sorry to say, you're/you have wasted your time and money fella.
Porting is for 2 stokes, gas flowing is for 4 stokes, just gas flowing an FZS600 head will get you almost nothing. The bike can already use 99 or 100 octane fuel as standard, gains err almost nothing.
These engines are already in a high state of tune as standard, they require serious (cams, pistons, over bore, carbs etc) engine work to get any meaningful gains, all possible but very expensive and not worth the gains. Biggest up grades to a standard engine which will give you better mid range is fit a free flow air filter and an open end can, nothing else needed.