will a 2001 gsxr750 6 inch over extended swingarm with the hump fit a 2000 hayabusa and is there any modification need to be done thanks for any help

YES... it should, you can take a Hayabusa swingarm and attach to a 750 and gain about an inch...the hump is questionable.. try and let us know!

thank you for the information ill try it and let you know

you will need to use the linkage from the 750 for it to work on the busa though.