You could just fit a couple of cans under the seat (not connected) to give your bike the appearence of having 4 cylinders. The give away being when you start your bike they won't smoke. I did this to a zxr i built. looked great and fooled tons of people (into thinking i ha a 4into 4 exhaust not making them think it had 4 cylinders, which it did before some smart arse pipes up!). Do it. Half the fun of having a bike is to personalise to your tastes.