GS - Gran Sport, used to indicate a road going Suzuki standard motorcycle, the only model that still uses this designation in the Suzuki line up is the GS500. XR - eXperimental Racing. Designation added to GS for Suzukis road legal race replica motorcycles thereby creating GSXR. There are additional suffixes added to the GS "road going" moniker such as GSX (just Gran Sport eXperimental) for the Katana motorcycles or GSF (the F stands for something in Japanese that I can't remember but generally indicates a sporting but not race replica trim) for the Bandit motorcycles. To be noted, the Hayabusa is technically not a GSXR but some hybrid between the that and the Katana given it's model moniker GSX1300R. Also to be noted, Suzuki's non-road legal race bikes are coded as XR for just eXperimental Racing.
You cannot modify a 2007 GSXR motor in a 2004 GSXR frame.
the sensor for your side stand may not be working so it thinks the stand is down and cuts out as a safety feature.
cut both wires that run to the sensor and splice them together.
i am not sure of the 2003 gsxr 600. but i have an 07' gsxr and i had mine to 171 on the highway in 6th gear.
yes it will
No will not fit
how fast would it make the bike