Hey guys I am rebuilding a 1976 Honda 550F and got a set of Mikuni carbs in a 550 parts sale. I cant find a parts number on the bank of carbs and I dont know if they will work on my bike. 1st question - are the Mikuni's better carbs than the Keihin's? 2nd question - How can I get a parts number or identifier. See photos below. Thanks