i have an 08 wr250 totally stock. i plan on doing all the free mods but when it comes to the exhaust i am not sure what i should do. i have read about swapping with the yzf exhaust and that sounds really cool but after i pick up a new endcap and silencer, i would have only saved about 80 dollars. now when i think of it, it seems like i am just delaying the inevitable. here's where i get my numbers; stock yzf pipe- 50-80$ pmb endcap w/ silencer- 120$ Mounting Hardware- 10$ shipping- 45$ total: 225-255$ new fmf q4 slip on exhaust - 300$ shipping - 10$ Total: 310$ i am assuming the new exhaust will deliver more power than the yzf and that the slip on exhaust will be all i need to buy, (besides getting it re-jetted) i am a green horn when it comes to bike mods, so if i left something out, or this just plane won't work, please let me know.