Trash,
One of my riding buddies has an 06 KX250. The bike does a great job of crawling up the ugly single track hills that we ride - and his has an SST top end pipe. A larger tank is nice but I have been able to make do with an odometer and then figure out my max range. I use a $15 BC800 bicycle speedo as an enduro computer. Works excellent. I have a post here somewhere on how to do it. Cam.