CB750F Super Sport F-F1 '75-'76 SOHC KeiHin 064A and 086A
All of the CB750 SOHC carbs made from '69-'76 look similar, but they are VERY diverse. You have to pay close attention to the specific version to correctly rebuild and the bike they are currently installed. Even the motors can be swapped, so this can even include the '77-'78 years. They are found to be interchanged and very mixed-up so just replicating current parts installed, is a recipe for disaster.
This section covers the '75 CB750F 064A and the '76 CB750F1 086A, the first two years of the CB750F Super Sports. The idle adjust is found on the on the right side of the carbs due to the petcock changing to the left side all the CB750 gas tanks '75 and later. Also these carbs came with the gold colored zinc on most of the steel brackets and linkage. The '75 064A is unique as it has a different bracket with a stopper ear at the top of the bracket, where the risers mount. See picture below to see this unique bracket. Otherwise they are the same as a 086A found on CB750K6 and CB750F1 1976 models.
Keep in mind that from '71-'76 you can physically change bodies and throttle risers in almost any combination. It is rather rare to find the carbs to be 100% correct. The main differences to consider is what side of your tank the petcock is on so your carbs have access to the idle adjust that will be on the opposite side as the petcock, and always build the carb body to the id number as called for on that body.
You can see the difference if you look at the two tops of the main bracket where you can see the triangular stoppers on both sides.