hey everyone! this is my first post so bare with me if this question seems basic. i just bought a '71 honda cb450k with hopes to make a nice little cafe out of it. when i bought the bike it didn't come with the stock airbox which seemed a bit odd. the bike was running ok and i figured that id just through some k&n's on it and bob's your uncle. no such luck. it's not running too well at all. since then i've been talking to a few different guys and the diagnosis is always the same. they say "thats a great little bike but a pain in the ass to tune right" or "whatever you do, don't remove the stock airbox or mufflers!!!" crap. i don't have either. i've been told that the stock CV carbs are a real piece of work and won't allow any mods... so, its swap the carbs or track down the stock airbox and mufflers. and if so which carbs are the best replacements? any help would be much appreciated. Any suggestions???