Hello, I jetted up a couple sizes for break in of my new rebuild. The little washer/disc type piece that holds the main jet and tube from sliding is gone. I had some mikuni carbs from an older sled but they don't work cuz they are the bigger type and don't make clearance on bottom of the bowl. I guess I am going to have to order that piece, can't find one laying around or by buddies either. Can a person use a small washer for now just to hold it until I get one? thanks.