That third nipple is simply a vent to supply air to the back side of the vacuum diaphragm. The fuel cocks are relatively easy to clean and rebuild. The PO may have replaced the vacuum diaphragm, but in my experience the O-rings and strainer need to be replaced as well. They get hard after a while and fail to seal, no matter how tight everything else is. I've got pics from the last time I did mine: http://nighthawk.kylemunz.com/?p=151
-Kyle On Sat, Aug 26, 2017 at 6:17 PM, Tommy Hill <[email protected]> wrote: > Internal to the petcock, then. I believe there are rebuild kits for it > but you have to drill out the rivets and tap new screws. Not for the free > handed. > > -- > You received this message because you are subscribed to the Google Groups > "Nighthawk Motorcycle Lovers!" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/nighthawk_lovers. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/nighthawk_lovers. For more options, visit https://groups.google.com/d/optout.
