I am looking to buy a DT 250 Enduro. The bike looks really clean and starts right up. The only thing that is missing is the right side cover. I believe there used to be a tool kit there. My question is does the 77 come with an oil tank? The guy says he just premixes and has never had an oil tank. Is this the way they were made in 77? Does it matter I donĀ“t have one as long as I premix gas and oil?