Carbs Flooding Engine, - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 8 (permalink) Old 06-17-2012, 12:53 PM Thread Starter
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Carbs Flooding Engine,

Hi,

Just putting my vulcan 750 together & getting it running, it seems now that the carbs are constantly flooding resulting in fuel spilling down the engine, also it looks like the carbs are flooding the cylinders because there was an almighty bang from the head, I thought a piston had hit something!
but it started fine after, its also running quite rich.

the bike has been mothballed during last winter while I did some work on it, prior to that I had changed the float needles in the carbs.

I appreciate your help!

Chris
Mcr Uk
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post #2 of 8 (permalink) Old 06-17-2012, 01:04 PM
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Sounds like stuck floats or maladjusted float level.

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


1990 Kawasaki Vulcan 750

1998 Honda VFR800 FI

2014 Honda VFR800F

1989 Pontiac Firebird Formula 350
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post #3 of 8 (permalink) Old 06-17-2012, 01:32 PM
..have a vulcan good day!
 
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Quote:
sounds like stuck floats or maladjusted float level.
x2 !

'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
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post #4 of 8 (permalink) Old 06-17-2012, 01:34 PM
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Keep an eye on your oil and level! You say flooding the cylinders, would almost bet you are getting fuel in the oil!

04-3,200 miles bought July 2011 with 928 miles. Loaded with acessories to many to list here, see my albums for more details! I also make a custom tank bib specific for the 750 if anyone is interested, ck my albums for some pics.
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post #5 of 8 (permalink) Old 06-17-2012, 03:33 PM Thread Starter
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vulcan 750 flooding carbs

Thanks for that chaps!

when I tried to start the bike this afternoon it made a big bang and I pushed the start button again and it was as if the engine was stuck ie would'ent turn over!

It did start and run after that though,

do you think there is any serious damage, like that bang being a piston or somthing?

Ride Safe
Chris.
Mcr UK
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post #6 of 8 (permalink) Old 06-17-2012, 04:11 PM
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Quote:
Originally Posted by Chris.Mcr View Post
Thanks for that chaps!

when I tried to start the bike this afternoon it made a big bang and I pushed the start button again and it was as if the engine was stuck ie would'ent turn over!

It did start and run after that though,

do you think there is any serious damage, like that bang being a piston or somthing?

Ride Safe
Chris.
Mcr UK
As long as it is running and performing fine, it should be OK. People have had backfire come out of the air boxes (and blow them off...) before.

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


1990 Kawasaki Vulcan 750

1998 Honda VFR800 FI

2014 Honda VFR800F

1989 Pontiac Firebird Formula 350
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post #7 of 8 (permalink) Old 06-18-2012, 08:19 AM
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Quote:
Originally Posted by Chris.Mcr View Post
Thanks for that chaps!

when I tried to start the bike this afternoon it made a big bang and I pushed the start button again and it was as if the engine was stuck ie would'ent turn over!

It did start and run after that though,

do you think there is any serious damage, like that bang being a piston or somthing?

Ride Safe
Chris.
Mcr UK
I would get the flooding sorted out and not keep starting it, sounds like you are getting too much fuel into your piston chamber and stopping the engine turning over, if you keep trying to start it like that you may do some serious damage to the con rods .
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post #8 of 8 (permalink) Old 04-03-2017, 02:45 PM
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Originally Posted by romeobravo172 View Post
Keep an eye on your oil and level! You say flooding the cylinders, would almost bet you are getting fuel in the oil!
So I am having the same issue here, I started my bike and the RPMs sky rocketed to the top and I heard a loud bang that had all the neighbors scared. I was having issues before when I was starting the bike and looks like out of habit I turned the throttle to many times when trying to start and I think the fuel might be leaking from the carb to other systems. How can I check if that is true? and how would I remedy the situation?
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