watercross1

Hello Cotton Experts. Need some help identifying a Cotton Trials I recently acquired in the United States. Supposed to be a 1966. Seems to be all original except that it is missing the air filter and maybe a left side cover if it came with one. Any information would be greatly appreciated. I am pretty sure the pipe is original but it may have been modified by adding 8 to 12 inches in the middle. I can not figure out how to post a pic but the bike is in my profile pic.