I would like the bike to not leak fuel when I lie it down, but I like having a reserve position on my petcock. Is there a vacuum operated petcock, which retains the reserve function, available for the DRZ? I've looked around on the web but can't find anything. Maybe you guys and girls know of something suitable. Failing that, has anyone tried fitting a universal vacuum operated fuel valve before? That way, I could keep the standard petcock and still have the fuel flow stop when the bike is lay down (and not running). Thanks in advance.