I recently found a 1972 CB750 that was on craigslist for about 2 weeks. The price was okay but what got me was the low mileage. The bike only had about 5,000 miles. I talked with the owner several times and ended up buying the bike. One of the drawback was that the top right exhaust had some rust damage. As you guys are well aware, the original 4 into 4 exhausts are hard to find and expensive when you do find them. The bike was otherwise in good condition with a rust free tank and fairly decent paint job though it was faded. That same week I looked through the internet for a parts bike where the exhaust was in good condition. It took about a week, but I finally found a parts bike in Alabama, so I contacted the seller. This bike also had about 5,000 miles and the exhaust was in good condition. The bike was finally delivered on this past Sunday. I was in New York for a birthday party and arrived today in California and saw the parts bike for the first time in person. One of the first things that I noticed was that the bike from Alabama had floor boards. I've never seen floor boards on a CB750 before. Does anyone have any information on these floor boards?