OK, If the numbers are in sequence with the US ones, not always true of Honda, its a 1977 CB550K3, should be black with red stripe and 4 into 4 pipes (if those are fitted take great care of them as, unlike the earlier "trumpet" type they aint made anymore)
Carbs are different from all other 550 and very poorly documented being mentioned only in a bad quality Honda Manual supplement to the original 500 four manual.
Float level is quoted at 14.5mm and the pilot jets are pressed into the body but regularly block. They can be removed by gripping with Mole Grips CAREFULLY then pulling and twisting at the same time, clean out all the cross as well as the through hole with SOFT brass wire then refit by tapping in with a soft, preferably nylon, hammer(Hide or fiber tends to go up the jet hole).
I do have the original Honda manual with all avaiable supplements scaned to cd in PDF format. If you want a copy its the cost of the airmail + a beer.