I have a 1987 Suzuki lt50 that I am working on. I have always had trouble getting it started and felt it wasn't getting good gas flow. Does anyone know much about the diaphragm in the petcock? Does gas flow through it or around it somehow? How can I tell if it operates correctly? Does anyone know where to just buy a new diaphragm without having to buy the whole petcock? It doesn't show up on any parts diagrams. Any help or knowledge you could pass on to me would help. Thanks.