There is something of an 'issue' with the fuel hose routing on the "F" bikes, in particular, and it came from the combination of parts that yours has. At first, Honda routed the hoses much like you have, albeit with the tee sitting at about 45 degrees angle right behind the carb bracket, but later started moving the fuel tee around (as it really IS an awkward arrangement...) and finally made the spigot on the petcock point straight back instead of downward. On those later versions (on the F1 with the round-top carbs) the bikes came new with the hose wrapped around the outside of the #1 carb before turning in toward the others, and the tee was placed behind #1 on those versions.
On yours (with the fuel spigot pointing down) they came 2 ways, and you might wish to try the 2nd 'method' I remember, which was (and is on my own F0): instead of routing the hose down thru the hole in the carb bracket (which was intended to prevent kinking of the hose by making the radius bigger), just route it over the top of the bracket instead. If the hose wants to kink, like it often does on cafe' bikes where the tank has been altered a little bit (i.e., further back) in position, cut the hose about 2" from the petcock, get some 1/4" copper tubing and make a 90-degree bend in it, and a tight one, and use that to make the rearward transition.
On bikes with the Carpy tanks, the only option I have found that works is an extravagant extension of the above: I make a 90 degree bend of copper (or aluminum) tubing from the petcock, then rubber hose to a tee above the airbox (right in the middle of the airbox, fighting for position with the bowl vent hoses and drool drain hose from the F0/F1 tanks, if stock) where I tee out with equal-length hoses to the 2 carb feeds. I have found this method makes the bikes have a higher top end because the fuel is more evenly divided between the 2 feeds, and the needs of the closer one don't hydraulically stymie the other side so much. This is noticeable above, say, 90 MPH, more than at other speeds, but I am told (by the bike owners) that it immediately improved throttle response in uphill passing situations in the mountains, particularly on bikes equipped with things like 836 pistons and bigger cams. If so, then it will also improve things on an otherwise stock setup.
