I’m turning my bike into a drag/ duner bike. I’m on the heavier side so I need to cut some weight off the bike. I want to get a dirtbike subframe. But I’m not sure if it’ll work. I need to know what years of crf subframes I can get and which ones can hold my exhaust. I have a Curtis sparks custom megaphone inframe drag pipe. It only uses the furthest mph yung bracket. If anyone has dont this please let me know.