Welcome to the forum. Please add your location and your bike's model and model year (NOT year first registered as UK paperwork shows) to your profile so that you don't have to remember to tell us every time and we don't have to keep asking when you forget (see Forum Settings link in my signature).
And welcome to the world of antique vehicle ownership (they own us, not the other way around). Your bike is about 4 decades old and obviously needs work to make it safe & reliable so it is highly recommended to download the Factory Shop Manual for your model (available through the CX Wiki - link in my signature) and go through all of the service procedures, regardless of whether it has reached the specified mileage.
I also recommend looking on all rubber parts with suspicion because rubber does not age gracefully. If it sat that long you don't need to check the date codes on your tires to know they are over 5 years old so they need to be replaced no matter how good they look & feel (old rubber simply cannot flow around the irregularities in the asphalt well enough to grip, especially if it is cool or wet). It looks like it still has the original rubber brake lines, which should have been replaced every 2 or 3 fluid changes (= 5 or 6 years) so you'll probably want to shop for modern stainless braided ones (they last practically forever and double the life of the fluid). And don't forget things like the rad hoses and the boot between the engine and swingarm (they can crack on the bottom where you don't see it).