Buddy of mine had a similar issue. We disassembled the petcock only to find that the previous owner had removed the spring behind the diaphragm. It's nice when the fix is simple, and cheap ;)
-Kyle On Sun, May 23, 2010 at 8:57 AM, Dennis <den...@samadhisoft.com> wrote: > Good tip! - thanks, Jaybird > > Dennis G > - Christchurch > > -----Original Message----- > *From:* nighthawk_lovers@googlegroups.com [mailto: > nighthawk_lov...@googlegroups.com] *On Behalf Of *jaybird...@aol.com > *Sent:* 22 May, 2010 11:48 > *To:* nighthawk_lovers@googlegroups.com > *Subject:* [Nighthawk Lovers] Petcock Solution > > In recent months, my high mileage (90K+) 92 NH750 has had a growing > number of fueling issues, including low speed surging, fuel starvation at > high speed, leaks and gasoline odor that nearly led to both me and the bike > being thrown out of the house. > > I was getting ready for a costly four-carb rebuild when a board poster > suggested checking the petcock first. We replaced it with one from a low > miles NH I found on Ebay and suddenly I had a different bike! > > There was good driveablility from idle to interstate speed, no more leaks > or odors, and an immediate increase in MPG. The repair was proved out on a > recent 1,700 mile ride through three states, which included visiting the > Barber Vintage Motorcycle Museum near Birmingham, AL (a must-see for any > rider.) I averaged 50 MPG and did one back roads day at a hair under *60 > MPG*. > > The problem in the petcock was that there was a small hole worn through at > the center of the diaphragm, where it sits on a little post, which was > admitting gas when it was supposed to be sealing shut. Total repair cost: > $34. > > If you have this kind of problem, check the petcock first. It's a small, > simple device that can cause big problems, but also supports an easy > solution. > > Jay S > 92 NH750 > South Florida > > -- > You received this message because you are subscribed to the Google Groups > "Nighthawk Motorcycle Lovers!" group. > To post to this group, send email to nighthawk_lov...@googlegroups.com. > To unsubscribe from this group, send email to > nighthawk_lovers+unsubscr...@googlegroups.com<nighthawk_lovers%2bunsubscr...@googlegroups.com> > . > For more options, visit this group at > http://groups.google.com/group/nighthawk_lovers?hl=en. > > -- > You received this message because you are subscribed to the Google Groups > "Nighthawk Motorcycle Lovers!" group. > To post to this group, send email to nighthawk_lov...@googlegroups.com. > To unsubscribe from this group, send email to > nighthawk_lovers+unsubscr...@googlegroups.com<nighthawk_lovers%2bunsubscr...@googlegroups.com> > . > For more options, visit this group at > http://groups.google.com/group/nighthawk_lovers?hl=en. > -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to nighthawk_lov...@googlegroups.com. To unsubscribe from this group, send email to nighthawk_lovers+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en.
