What size suit, how tall are you, and how much do you weigh?
For comparison, I've got the same suit (last years model though)
I'm 6'-3", 220 lbs (without suit) and I wear a 56/46.
It was a little snug initially, but it's broken in just fine and fits really well.
If it's restricting your motion uncomfortably, then you'll probably be better off with a larger size. My first 2 piece leathers, the pants were a size too small and bending my legs really caused my quads to burn after 20 minutes of riding.
If the suit is just a little tight around the midsection, but your arms/shoulders and legs/hips feel okay, then the suit is probably the right size.
Kinda a vague response, but I hope this helps.
2008 GSXR 750