whats up man.. you can do a search here for all of those things and it will keep ypu busy reading for hours, this site is full of info, yea its great..
Most will recommend Maxxis Razor's, they are said to be great tires and last pretty long, Ive had holeshots xcr's and they are good but they wear pretty fast, doing dounts and the street prob doesnt help though :biggrin:
For the pipes, there are so many good pipes out there, I have T5s and they are great.. T6's would be a great choice if you dont plan and going crazy with engine mods on your shee, and yes they are loud, almost any aftermarket pipe you buy is goin to 10x louder than stock, I believe that toomey's hush kit does help alot....
Just keep searching here, more than likely and question that you have, has been answered numerous times....
Oo0 and shocks, I personally think if you are a weekend warrior like myself works would be a good choice if you dont want to go for the extra on the elka's... My brother has had works on his 250r and they are sweet.. I have works G-series, they look sweet but I havent ridden them yet...
For the price that you can get a set of works, you cant go wrong.
http://www.worksperformance.com/html/home.html