I have picked up a project 1980 kz 440. The bike is being turned into a bobber and this is my first bike build. With the frame work that was done there is not enough room for the stock air box to fit on the bike. I was able to get the bike to start and after idling for a few moments the rpm started ramping up quickly and turning down the choke kills the bike. I have been reading and watching a lot of discussion around the air box with the stock carbs but I am wondering if you are able to actually get the stock carbs to work without the stock air box or is it a waste of time and just swap the carbs out with a single mikuni carb and not mess with the stock ones?