Hi, I have just bought a square alloy barrel and head, thinking it was for a DOT trials/scrambler but im not sure!! I have two heads for it which are both different, and the barrel has a chrome bore. The black head is definately off a DOT, as i took it to the DOT stand at stafford and they confirmed this for me. It won't let me upload any pics so if you can help me, please send me your email address and i will send you the pics!! Many thanks, steve.