Carburetor Fuel Flooding Come back!!! - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 13 (permalink) Old 08-07-2008, 02:00 AM Thread Starter
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Exclamation Carburetor Fuel Flooding Come back!!!

I tried the different tricks to "fix" carb flooting: seafoam, Gumout and others,
it is! I will have to open it and rebuild. My question.... What I need replace to fix flooting carb problem? needles, float valve, o rings?
I would like to do a good job..please give some help...thanks

1989 Vulcan 750
Bobber style.
33000 miles,
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post #2 of 13 (permalink) Old 08-07-2008, 04:17 AM
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Inside the float chambers, what you replace depends on what the problem is. If a needle is damaged/worn somehow, and causing the leak, then you'll need to replace it. If it's just a chunk of debris on the end of the needle, then you'll just need to clean it.
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post #3 of 13 (permalink) Old 08-25-2008, 11:24 PM
 
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is this happening while the bike is just sitting, or while ur driving?

if its when ur sitting, is ur fuel selector in the "ON" position? (pointing straight down) or in the prime or "PRI" position (pointing towards the back of the bike) If its in "PRI" it will allow fuel to flow freely into the carbs, with gravity helping it along, and can over flood the carbs (i had this problem when my bike was parked for 7 year, over filled the crank case with fuel/oil)

when its in the "ON" position, fuel cannot flow down the fuel lines until the engine is running do to the vacuum diaphragm turn on. basically, that lil black line that goes from ur carb vacuum port to the petcock, provides vacuum to actually turn on the fuel to the carbs
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post #4 of 13 (permalink) Old 08-26-2008, 02:40 AM Thread Starter
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Ok vulcanetors, I get carbs clean and synch, know my bike sounds good in idle, but when I get runing ......the rear cylinder sound low, just the front cylinder seems it's pushing the bike. Why? ( I'm sure is no Carburetor Fuel Flooding problem now sooooo what is?)

1989 Vulcan 750
Bobber style.
33000 miles,
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post #5 of 13 (permalink) Old 09-04-2008, 04:37 PM
 
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From C. Buhr

Check vacuum diaphram in fuel cock. May be leaky.
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post #6 of 13 (permalink) Old 09-04-2008, 07:45 PM
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You could still have crud in the high speed jet. It may take more than one cleaning to get all the junk out of your carbs.
Or, you may not have reassembled them correctly. This is easier to do than you might think.
Did you check your diaphrams? If they have holes in them, the CV slide may not operate properly and cause problems.

Jim W
93 VN 750 "Ursula"
Moved R/R 08Sep06
R/R rewire 17Feb07
New R/R, Installed 14Jun08
New Stator installed 10 Jun08
Maintenance Free Battery 12Jan08
21480 Miles
VROC #8542
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post #7 of 13 (permalink) Old 09-05-2008, 01:58 AM Thread Starter
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She has the original hoses (19 years old) I will replace all hoses to make more sure.

1989 Vulcan 750
Bobber style.
33000 miles,
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post #8 of 13 (permalink) Old 09-11-2008, 10:15 AM
 
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Rebuilt the carbs replaced o rings, and floats and unstopped jets. Took a
test ride, 2 miles, running great then front carb started flooding. I have visually inspected float valve etc. seems ok. How should the floats be adjusted. Maybe It is not shutting off completely when the chamber fills up? Or any suggestions?
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post #9 of 13 (permalink) Old 09-11-2008, 05:52 PM
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It took me three cleanings to get all the crud out of my carbs. It seems that the first two knocked some crud loose in obscure corners and it came back to haunt me. That and a high speed jet that vibrated out of its holder didn't help.

Jim W
93 VN 750 "Ursula"
Moved R/R 08Sep06
R/R rewire 17Feb07
New R/R, Installed 14Jun08
New Stator installed 10 Jun08
Maintenance Free Battery 12Jan08
21480 Miles
VROC #8542
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post #10 of 13 (permalink) Old 09-11-2008, 06:10 PM
 
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Just a little hint - I bought off eBay a small ultrasonic cleaner, 30 bux plus postage from memory it works a treat for cleaning the small bits and the boss uses it for her jewellery as well so even though it's something that rarely gets used, it's a good thing to have laying around.
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