Just do the throttle tube mod from a yamaha its way cheaper like $17. On my 07 gsxr 600 i didn't have to modify the housing. The link has a whole write up on how to do the mod. With my bike i didn't have to dremel the housing at all. When it was finished it made a huge difference in the distance that you have to turn the throttle.
Part: 2CO-26240-00
http://www.gixxer.com/forums/showthread.php?t=213953
Just do the throttle tube mod from a yamaha its way cheaper like $17. On my 07 gsxr 600 i didn't have to modify the housing. The link has a whole write up on how to do the mod. With my bike i didn't have to dremel the housing at all. When it was finished it made a huge difference in the distance that you have to turn the throttle.
Part: 2CO-26240-00
http://www.gixxer.com/forums/showthread.php?t=213953