Shortening exhaust - will any problems arise?

Hi all.
I have a carbon fibre IXIL pipe on my 00' zx9 I am thinking of shortening it to make it look a little better.
I'm guessing it will sound a little louder, but will it cause rough idle, running leaner or any other issues.
cheers
I have a carbon fibre IXIL pipe on my 00' zx9 I am thinking of shortening it to make it look a little better.
I'm guessing it will sound a little louder, but will it cause rough idle, running leaner or any other issues.
cheers