you can go with a jemco. do a search on google or do one here as a matter of fact, and im sure you'll find the address, phone number, and email address. nice sectional cone pipes, come uncoated, bare metal, so you can do whatever you want to it. paint, chrome, jethot coat, etc. like 250 but takes a few weeks cuz they are custom made on a jig. not already made or made by machine. sweet pipes, its what im going with on my 86. you can use like a pro circiut pipe for a kx, but you have to mod the hanger i believe as well as the stinger end of the pipe. im also gonna be using a 38mm airstryker carb like on my 85 t3. and like cr says, the 88-04 intake boot off a kx 250-500 will work with the left aiming direction. good luck on the project and keep us posted on progress, pics pics pics.
1985 KXT 250 Tecate - kx cylinder, kx ignition, bassani headpipe, answer silencer, v-force reeds, 38mm airstyker carb, +2 franks swinger, raptor rear shock.
1996 YSF240 Blaster - maxxed out!!!
Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting "HOLY SH-T, what a ride!"