Sorry, but I'm thinkin' carbs, too. Specially the float valves. Not the floats themselves, but the valves (the little rubber-tipped brass pieces they control). Sounds like they are not seating properly, so not shutting off like they're supposed to when there's enuf fuel in the float bowl.
Also, have you drained the crankcase vent tube of bypass gas and moisture and made sure there's no residual in the airbox? On Jul 26, 10:29 pm, Graham Rogers <[email protected]> wrote: > I was afraid someone would send me back to the carbs! Graham > > On Jul 26, 2012, at 7:08 PM, Allen Thomas wrote: > > > > > Floats stuck open? Did you put them in the right direction? Did you set the > > fuel screws to a common value between all carbs. Sometimes people turn out > > the screws to compensate for clogged jets. Stuck enrichening plungers? Try > > starting it with the throttle opened to dry it out. > > Sent via BlackBerry by AT&T > > > -----Original Message----- > > From: Graham Rogers <[email protected]> > > Sender: [email protected] > > Date: Thu, 26 Jul 2012 18:14:58 > > To: Nighthawk Lovers<[email protected]> > > Reply-To: [email protected] > > Subject: [Nighthawk Lovers] CB550SC Nighthawk flooding > > > Here's one that's got me scratching my head. I just started work on a 550 > > Nighthawk. I cleaned the carbs before trying to run it although the PO had > > it running and I was there with him. Now with the carbs back on it runs on > > 1 and 4 but #'s 2 & 3 are just flooding. The gas is going straight out the > > mufflers. Seems to have good spark on all 4. The carbs were relatively > > clean before I cleaned them. Compression is excellent. Bike has only done > > 11k miles. I have the tank off and am running it through a funnel and hose > > so it can't be the pet cock. Any suggestions? Graham > > > -- > > 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 > > athttp://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 [email protected]. > > To unsubscribe from this group, send email to > > [email protected]. > > For more options, visit this group > > athttp://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 [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.
