Auto body repair & detailing: cb650 1980 honda interchangeable gas tanks, twin cam engine, motorcycle questions

Question
I was wondering if you could tell what tanks will interchange with a cb650  1980 Honda. I have bought two used tanks and neither will fit. I bought a cb550 was told it will fit but the yoke was 4 inches and my yoke is around 3 and 7/16, length 22 in. width 13 in.  Thanks . Deb

Answer
I don't normally get motorcycle questions, but you stumbled upon a guy who has a motorcycle business on the side! Only a Cb650 tank will fit your bike, from bikes that are known as a twin cam engine bike. If you have a "K" moel, it must be from a "K". If you have a super sport, it must be a super sport. I would try ebay. I don't personally have a tank for a CB650 right now.