my 1987 250x - opinions?

[JJ69]

how much of a difference would there be between the stock exhaust and a performance one on an 87 250x?
what is the cheapest, keeping in mind not horrible quality like cobra..?
i mean like cheapest in the top brands?
what else should i do to it? fenders, tires, rims, skidplate(not on yet), everything else is done, just nothing powertrain related.. it has a new x-ring chain and good sprockets.. could go for a wider axle or something... what are some other options?
i do alot of trails/gravel pits.. i like speed, jumps, etc..
i do go on quite a few long trips,etc so i cant have a really loud muffler.
http://img167.imageshack.us/img167/1372/250xfk9.th.jpg (http://img167.imageshack.us/my.php?image=250xfk9.jpg)
http://img154.imageshack.us/img154/6189/250x1wk1.th.jpg (http://img154.imageshack.us/my.php?image=250x1wk1.jpg)
thats her.

[Xater]

i got one of thos babys same color and year! there isnt much you can do to a 250 but mabie just pc exaust.

[JJ69]

what do you think of her?
i just bought it for $2k canadian.. its in unbelievable shape for how old it is.

[Xater]

looks clean and kept well! there really fun to beat on...
mine has a blown came in it right now tho :( make sure all the seals are good in the bottom end of that thing mine used to leak oil out of the bottom end that resalted in the blown cam.

[Xater]

oh and be carfull of the kick starter it can get your leg some times..

[JJ69]

right on i'll try... any more tips?
i've only ever owned utility bikes.. this'll be my first sport.. i always drove the ute's like sports, but now i finally have a bike meant for what i've been doing to ute's for 12 years. lol