i'm tryin to find something out for a buddy of mine cus i cant find ANY information for a friend. Ok i drive an 07 600rr and he has an 07 gsxr 600. we both swapped and rode each others bikes last night. Mine is NOTICEABLY faster. I have gone down 1 in my front gear and put on exhaust...thats it. He couldn't believe mine was so much fast.I can clutch my bike up in first gear at 14 or 15 mph.i couldn't hardly get his tire off the ground clutchin at 42 mph in first gear.I finally did but it took alot of work!Ok another buddy of mine has the samegsxr and his is the exact same way. What i'm tryin to find out is if the 07 gsxr has the butterfly valves? And if so can they be takin out or would that screw the bike up? I know the yamaha has the limiter where it only has 60% of the power until 7k rpm.Did suzuki do the same with the butterfly? I dn't know anything about sudooki so don't hate!just helpin out a friend