Hi Hope someone can help. The petcock on my Z650 B3 is the most complicated tap I have ever seen. It is a Taiyogiken contraption that doesn't even have an off position!. It has reserve at the top pre (whatever that is) at the side and On at the bottom. I have found rebuild kits online but the many replacement parts seem fine - I just can't work it out. It flows so hard that all the carbs overflow and the only time the flow from the tap stops is when it is in the ON position. Can I replace this unit with something less complicated?