Joey4speed,
Gary and I have differing opinions on whether or not Honda designated model years to these bikes, but here is my opinion:
There are no model years associated with CT70’s until the 1976 model. The reason you aren’t finding info specific to a 1971 model is because there is no such thing. The production dates don’t denote the model year, they simply give you the build month for a particular bike. Honda designated the bikes with a “K” model. I believe what you are calling a 1971, is actually a K0 (K Zero), the first model CT70 produced. If you’re looking for info on your bike, you need to search for K0 info.
If you were to go by the production date on the black tag, Honda built two different models in 8/71, the K0 and the K1. Although quite different looking, are they both a 1971 or 1972 model? If Honda intended for them to be classified as a model year, I believe they would have set a uniform, specific date range for each model year to be produced, but….that’s not they way they did it.
From the 100’s of CT70’s I’ve owned over the past 30+ years, I’ve found that if a model year need to be placed on a bike…..say for a title….it happened at the dealership and the dealership titled the bike in whatever year they sold it. I bought a one owner K0 a few years ago. It came with all of the original paperwork and title. It sold in 02/73 and the dealer titled it as a 1973.
Just my $.02