I have a 1999 Yamaha Wolverine 350 4X4. The black plastic accellerator pump that is located on the side of carb is broken and I can't buy one for some strange reason. On the yamaha site I looked up the carb and they don't even have a part number on this piece. I am wondering if a Yamaha Big Bear 350 carb would work on this bike and from what year to what year would it fit on? They seem more plentyful