I am interested in modifying my 2002 SV650S. Inexpensive is better, obviously, but I don't want to cr@p it up.

I want to change my sprocket gearing. My main goal is not to make easy wheelies, however; I just want more oomph off the line, without losing 20mph off the top end. Does anyone have a sprocket combo which they find suitable for all-round bashing?

I also want to put on an exhaust. Are there any recommendations? I think that there may be some different restrictions in Britain; I'm in the US and as such I think I have some more freedom.

My 2002 is a K?

My model bike is carburated. How would I increase air/fuel richness? Would that provide any increase in power if done on it's own?

On the aesthetic side, I would like to replace the mirrors with something a little sleeker. I really hate the OEM mirrors. Anyone know any companies which provide aftermarket mirrors?
I appreciate any input.