Carb trouble - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Carbs and Fuel System
From the gas tank to the carbs
All fuel system discussion

 1Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 16 (permalink) Old 11-18-2015, 08:25 PM Thread Starter
Junior Member
 
Joe-'s Avatar
 
Join Date: Nov 2015
Posts: 12
iTrader: (0)
 
Carb trouble

First, thank to everyone here. I've been lurking for a while and have gotten a lot of great info.

I picked up an '01 VN750 from a buddy of mine. It had sat for at least a year, and didn't start right away. With a new battery and fresh gas, I was able to ride it home. When I was working on it at his place, I had noticed some gas around the bottom of the right-hand cab, but chalked it up to being flooded from so many failed starts.

A day or so later after I got it home I noticed the bottom half of the left-hand carb was wet with gas. I couldn't tell exactly where it was coming from - I noticed that there was no plug over the mixture screw (either side), and that area was pretty wet; but I'm not sure if that's where it was from.

I thought it might be a stuck float, so I drained both carbs, pulled the tank, and shot carb cleaner down both gas lines. Left side, no problem -- I sprayed till I saw a smooth stream of fluid, then closed the drain and let it soak. But the right side was clogged. I could only spray so much before it backed up through the hose. I even tried to give it a little push with my air compressor, but it would not budge.

So, now I'm thinking a clogged jet. Am I on the right track? If so, is there anything I can do other than pulling the carbs and giving them a thorough cleaning?

Thanks,
Joe
Joe- is offline  
Sponsored Links
Advertisement
 
post #2 of 16 (permalink) Old 11-18-2015, 08:52 PM
Senior Member
 
Spockster's Avatar
 
Join Date: Nov 2012
Location: WV
Posts: 6,444
iTrader: (5)
   
A clogged jet wouldn't stop flow into the bowl, but a stuck float/needle valve stuck closed would.

Can try whacking the carb bowl with a plastic screwdriver handle to see if it will shake loose.

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf

Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
Spockster is offline  
post #3 of 16 (permalink) Old 11-18-2015, 09:32 PM
FREEBIRDS MC CENTRAL NY
 
OleDirtyDoc's Avatar
 
Join Date: May 2011
Location: Norwich,NY
Posts: 15,868
iTrader: (0)
     
Garage
Send a message via Yahoo to OleDirtyDoc
Look up Wolfie's back blow method as well

ONE RATS ASS GIVEN PER POST
Support your local FREEBIRDS MC
1986/5 Vn700/750 Frankenfook cross eyed bitch "Mellisa Fayhe"
I am a BIKER and i'm proud.FREEBIRDS MC CENTRAL NY

lowered with progessive 412 10" shocks
rejetted for K/N Pods part#rc 2340
sportster seat

'I didn't lose my mind.i gave it away

BRING BACK WOLFIE."Peace and Carrots"RIP
"And I'm free...as a bird"John Lennon Free as a Bird
"I only carry when I have my pants on"Joe Robinson RIP aka Old Dog
OleDirtyDoc is offline  
 
post #4 of 16 (permalink) Old 11-19-2015, 06:57 AM Thread Starter
Junior Member
 
Joe-'s Avatar
 
Join Date: Nov 2015
Posts: 12
iTrader: (0)
 
I'll try both methods -- thanks!
Joe- is offline  
post #5 of 16 (permalink) Old 11-19-2015, 08:01 AM
2014 KLR 650!
 
Goofyfoot2001's Avatar
 
Join Date: Jun 2013
Location: Tega Cay, SC
Posts: 3,355
iTrader: (1)
 
Mine just leaked. The gasket on the bowl just leaked. I carefully put some red gasket stuff on their very thin and no more leak. Have to be very careful though that you don't get any in the bowl.

2014 Kawasaki KLR 650
Back to the Kawa World
Goofyfoot2001 is offline  
post #6 of 16 (permalink) Old 11-19-2015, 10:21 AM
Old Fart
 
Knifemaker's Avatar
 
Join Date: Jun 2004
Location: Catawissa, MO
Posts: 11,572
iTrader: (4)
     
Garage
The one that didn't back up through the gas line is the one you have the problem with, it sounds like the floats stuck or there's something keeping the needle valve from closing. Which is making it overfill with fuel and leak.
The blowback method and tapping with a screwdriver handle are both good starts....

If You Are Not Sure If I Am Joking or Not....I AM !!Photos:
http://www.flickr.com/photos/knifemaker1954/sets/
Knifemaker is online now  
post #7 of 16 (permalink) Old 11-19-2015, 11:01 AM
FREEBIRDS MC CENTRAL NY
 
OleDirtyDoc's Avatar
 
Join Date: May 2011
Location: Norwich,NY
Posts: 15,868
iTrader: (0)
     
Garage
Send a message via Yahoo to OleDirtyDoc
Quote:
Originally Posted by Knifemaker View Post
The one that didn't back up through the gas line is the one you have the problem with, it sounds like the floats stuck or there's something keeping the needle valve from closing. Which is making it overfill with fuel and leak.
The blowback method and tapping with a screwdriver handle are both good starts....
X2 on this.

ONE RATS ASS GIVEN PER POST
Support your local FREEBIRDS MC
1986/5 Vn700/750 Frankenfook cross eyed bitch "Mellisa Fayhe"
I am a BIKER and i'm proud.FREEBIRDS MC CENTRAL NY

lowered with progessive 412 10" shocks
rejetted for K/N Pods part#rc 2340
sportster seat

'I didn't lose my mind.i gave it away

BRING BACK WOLFIE."Peace and Carrots"RIP
"And I'm free...as a bird"John Lennon Free as a Bird
"I only carry when I have my pants on"Joe Robinson RIP aka Old Dog
OleDirtyDoc is offline  
post #8 of 16 (permalink) Old 11-19-2015, 07:36 PM Thread Starter
Junior Member
 
Joe-'s Avatar
 
Join Date: Nov 2015
Posts: 12
iTrader: (0)
 
Quote:
Originally Posted by Knifemaker View Post
The one that didn't back up through the gas line is the one you have the problem with, it sounds like the floats stuck or there's something keeping the needle valve from closing. Which is making it overfill with fuel and leak.
The blowback method and tapping with a screwdriver handle are both good starts....
Do you mean that with the drain open, it should back up through the fuel line? Sorry if it's a noob question, but I thought with the drain open, the bowl would empty and the value would stay open.
Joe- is offline  
post #9 of 16 (permalink) Old 11-19-2015, 09:08 PM
FREEBIRDS MC CENTRAL NY
 
OleDirtyDoc's Avatar
 
Join Date: May 2011
Location: Norwich,NY
Posts: 15,868
iTrader: (0)
     
Garage
Send a message via Yahoo to OleDirtyDoc
Good point.with the drain open it shouldn't back up the fuel line.the needle cave is stuck so no fuel will come into the carb.what did the fuel that came out look like when sustained it?

ONE RATS ASS GIVEN PER POST
Support your local FREEBIRDS MC
1986/5 Vn700/750 Frankenfook cross eyed bitch "Mellisa Fayhe"
I am a BIKER and i'm proud.FREEBIRDS MC CENTRAL NY

lowered with progessive 412 10" shocks
rejetted for K/N Pods part#rc 2340
sportster seat

'I didn't lose my mind.i gave it away

BRING BACK WOLFIE."Peace and Carrots"RIP
"And I'm free...as a bird"John Lennon Free as a Bird
"I only carry when I have my pants on"Joe Robinson RIP aka Old Dog
OleDirtyDoc is offline  
post #10 of 16 (permalink) Old 11-20-2015, 09:10 AM
Old Fart
 
Knifemaker's Avatar
 
Join Date: Jun 2004
Location: Catawissa, MO
Posts: 11,572
iTrader: (4)
     
Garage
Quote:
Originally Posted by Joe- View Post
Do you mean that with the drain open, it should back up through the fuel line? Sorry if it's a noob question, but I thought with the drain open, the bowl would empty and the value would stay open.
Yes, sorry, missed the part about the drains being open while you did this.... But then that would mean a stuck shut valve, which doesn't explain a fuel leak.

The jets would have nothing to do with this, clogged jets just make the bike run bad, not leak fuel. You didn't say the bike didn't run well, just that it was leaking fuel....
So, not sure how the gas line would be blocked up with the bike running OK...
Are you sure it was a fuel line and not a vacuum line you were spraying?

If You Are Not Sure If I Am Joking or Not....I AM !!Photos:
http://www.flickr.com/photos/knifemaker1954/sets/
Knifemaker is online now  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Once registered, your User Name"cannot be changed". We can make exceptions within 7 days, but after that, it is set in stone.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome