I have not yet done that on this particular bike but I did do it to my 07 GSXR750 and this website might answear some of your questions......
Gearing Commander: Motorcycle Speed, RPM, Chain & Sprockets Calculator
I am also thinking about going -1 in the front and leaving the rear stock...let me know how you like it. I did the same on my 07 GSXR750 (1- f and -2in rear) and I loved it really woke the bike up.
I am doing this modd this weekend as I am low on cash and had another car try and share lanes with me....bike is just too quiet. Just wanted to know if anybody else has done this and how the hacked pipe is holding up long term?
I hate it when I work Sat is screws up the whole weekend.....I only work ever 3rd......got plans already for Sunday...Close shorter rides are better for me until after June (wife gets back from Job out of state) ...Have 2 large crack head dogs require attention.
1991 GSXR1100 first bike scary fast and handled like a tank
1992 GSXR750 purple and black wasent my fav didnt own for very long
1994 YZF750R I didnt know how rare of a bike it was until after i sold it.
1999 GSXR750 probably my favorite bike of all very comfortable for a GSXR
2004 GSXR1000...