im in the market for an exhaust cuz the the one i have now (stock) has a high pitch noise. Is there an exhaust that has more of a mellow deep tone. something not to rhaspy. and that looks good. im leaning toward the one that comes out of the bottom of the bike (but havent figured out what will go in its place)so my seat wont get so hot. but im open for suggestions. people on this site seem to know all the ups and down when it comes to this bike thing. cuz im just getting my feet wet...ough.. another quest. how often do u do an oil change?? my bile got 2714 miles on it.