The fuel gauge itself isn't anything to rely on, I typically reset the Tripodometer with every tank and start looking for a gas station around the 90 mile mark. That said, it sounds like your sending unit is loose. Drain and remove your tank, and you'll find 4 bolts holding a square plate on the bottom of it, that's the sending unit. It's got a swinging arm with a float on the end of it that goes up and down with the fuel level. Right at the hinge where that arm swings there's a small metal cover that's just held in place with some tabs. Gently bend the tabs back and you can slide that off, there you'll see a coil of coper wire and a copper contact connected to the swing arm. As the arm moves up and down that contact sweeps back and forth across the copper coils. I suspect that yours has gotten loose and doesn't make contact with the coils anymore after it drops beneath a certain level thus indicating an empty tank. If you're careful you can gently bend that down a little so it makes contact with the coils again then slide the cover back in place and bolt it back up. There's a big O-ring that goes in there to keep it all from leaking so don't forget that bit. Or, you can just reset the tripodometer after every tank.
-Kyle On Wed, Aug 2, 2017 at 12:21 PM, Tap Dean <[email protected]> wrote: > i believe the fuel gauge to be faulty on my 83 NH 650. When the fuel > consumption gets to about 3/4 tank or so, it suddenly drops to indicate > only reserve is left so I make haste to stop and fill up. It will only take > about 1.3 gallons to fill it up, so something is up. Any ideas on how to > troubleshoot this? Thank you, Travis > > 1983 Honda Nighthawk 650 > 2017 Kymco K Pipe 125 > 1972 Bultaco Sherpa T 250 & 350 > > -- > 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.
