1978 RD 400
I still have one sitting in my mother's condo garage. I let it sit a few months too long and now the brake fluid has crystallized and the gas has turned. If you get one, plug up the auto-oiler and premix the oil and gas. I tried to keep using mine but seized a couple of pistons in the meantime. The premix ratio can be high 40 or 50 to 1 as long as you know there is oil in there. The bike is great around town, it is quick, but not fast like any of the new bikes. Top speed is around 95mph and is not very stable at that speed. Look up Spec II products on the internet for every product you might ever want for it. I know someone who kept his RD350 bone stock and had over 50,000 miles on it believe it or not. The hop-up stuff also makes it run hotter and can lend to top-end seizures. The bike around town is very nice but it is hard to find one in good shape because everyone wanted to race with them. Good luck finding one as clean as mine, and it isn't stock even then.