I need as much info as possible! Vf400fd

Hi guys, new to the forum as just bought a 1986 vf400fd and the bike came with no paperwork so if anyone could tell me any details about the bike would be great!
My main problem I'm having is the carbs needed balancing so done that but noticed the bikes idle would run away with itself and last night I found the middle fuel connection is made of plastic and has snapped! So guess that's where it's sucking in air.
What carb is it on the bike? Can you get spares in the UK or do I have to buy a new set off carbs? Thanks guys!