Absolutely check the petcock, as surfswab says. These symptoms are exactly like what happened on my bike and it turned out to be a small hole worn in the diaphragm. When I replaced the defective unit, not only did the symptoms clear up, my gas mileage went from the 40s into the 50s.
Jay S 92 NH750 South Florida On Aug 26, 2:54 am, surfswab <[email protected]> wrote: > Sounds like our old pal, the petcock. Specifically, the diaphragm. > It's a rubber part and we all know rubber parts don't last forever, > and they can go bad instantly. All it takes is for a pinhole or other > tear or wear to develop and they can produce all sorts of symptoms > that you might guess are more severe and related to other causes. > > Fortunately, they are relatively easy to check and cheap to fix. Pull > the tank, pull the petcock, undo the four screws on the side and > inspect the diaphragm carefully. Doesn't take long, maybe an hour or > so. But eliminate it first before puzzling over anything happening > south of there. > > Petcock repair kits go for less than $20. > > If it's malfunctioning, it can cause raw gas to drain into the float > bowls, back up and overflow from the float bowls into the intake > manifolds, air box, cylinders and crankcase, causing a general mess. > > Typical repair is replace the diapraphm, drain everything, change oil > and filters and clean the plugs. -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en.
