Author Topic: Carb question  (Read 2132 times)

Offline nuttyprof1

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Carb question
« on: August 28, 2007, 11:13:02 AM »
This is about carbs for my other bike, a 1992 750 Honda Nighthawk. I cleaned the carbs, including the needle valve seat, because of some dirt. When I put the float back, with the carbs upside down, two of the floats do what I think is right, that is they kind of float on the spring of the needle. If you touch the float (these are non-adjustable floats, entirely made of plastic), it feels springy. They are more or less parallel with the ground. The other two sit all the way in the carb, and they are definitely not springy, and they kind of angle down from the back toward the front. It drives me nuts, because I can't figure out what I could be doing wrong, since everything is pretty much set and not much is adjustable. I have worked with carbs many times and it's the first time this is happening. Anyone with any suggestions here?
Thanks
Nuttyprof1

Offline pmackie

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Carb question
« Reply #1 on: August 28, 2007, 06:13:17 PM »
Sounds like the spring in the "float needle valve" is shot, or else the carb levels are way off.

Check all the float needles to see if they still have spring tension, and replace them if they don't, then set all the carb levels to factory spec's
Paul
2002-GSF600S, Progressive Fork Springs, B12 Shock,
SS Brake lines, EBC HH pads, Leo Vince Ex & Kappa bags.
Ex Bike Mechanic (late 70's), somewhat rusty
32 years in the Fuel/lubes industry(Retired)

Offline Blade

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Carb question
« Reply #2 on: August 28, 2007, 11:53:29 PM »
Are the floats leaking and is there fuel in them? Also I have never seen a non adjustable float. There is usually a little tang that the needle valve hooks to or goes over the needle. But I have not had a set of Night Hawks carbs off.