Backblowing a carb to clean. - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Carbs and Fuel System
From the gas tank to the carbs
All fuel system discussion

 2Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 49 (permalink) Old 03-27-2013, 10:56 PM Thread Starter
Registered User
 
Join Date: Aug 2011
Location: GreenwoodFrickinLakeNY
Posts: 10,354
iTrader: (8)
   
Backblowing a carb to clean.

Ive written the proceedure one too many times in threads, so here it is as a sticky.

Often particles get into a carb which SeaFoam and such wont dissolve. Many passages are somewhat "venturied" (just made that up) meaning the stuff gets in, but wont pass...like a bad gallstone.
Theory is : send it out the way it came in. Pure logic.

A quick and easy proceedure that often solves the problem :

1) remove the intake device on a specific carb (be it a stock snorkel or a pod).

2) place a piece of tubing over the drain nipple on the carb and loosen the screw. Drain carb.

3) place and hold a 1 foot or more piece of tubing onto the drain nipple. Blow thru it untill you see it "spitting" from the intake.

4) close the drain, refill carb, and repeat.

This works 7 times outta 10....easy peasey...back on the road.

Added note to my original proceedure...if its really bad, blow it out once plain, then open up the throttle and do it again....




Last edited by Wolfie; 06-15-2013 at 01:17 AM.
Wolfie is offline  
Sponsored Links
Advertisement
 
post #2 of 49 (permalink) Old 04-10-2013, 04:15 PM
aka Smokymtnvulcan
 
Ablerider's Avatar
 
Join Date: Sep 2009
Location: Western North Carolina
Posts: 41
iTrader: (0)
 
What's an intake device? (I know, I'm stupid)

VROC #28359 Murphy NC
Patriot Guard Rider
US Army (Retired)
NC Law Enf (Retired)
VN750A3 New RR, New Stator, New Tires, Cleaned Carbs, New Choke Cable, Degoated and Marbled, replaced ACCT with MCCT, Custom LED Signals F&R, Custom Luggage Rack.
Did Tail of the Dragon in 1972 and again 07/2011
I like pipes I can hear!
I wear leather so I won't hurt too bad!
I wear a half helmet so I can see and hear better!
Not a poser, not an outlaw biker, JUST ME!
Ablerider is offline  
post #3 of 49 (permalink) Old 04-10-2013, 05:40 PM
Senior Member
 
Okiebezer's Avatar
 
Join Date: Apr 2012
Location: OKC
Posts: 1,011
iTrader: (2)
 
I'd guess an air cleaner since he mentioned a pod...
Okiebezer is offline  
 
post #4 of 49 (permalink) Old 04-10-2013, 06:51 PM
Senior Member
 
kc2dgq's Avatar
 
Join Date: May 2010
Location: New Jersey
Posts: 3,350
iTrader: (13)
 
Garage
rubber boot that comes from the airbox.....or if you did the ear shave procedure it's the pod filter.
kc2dgq is offline  
post #5 of 49 (permalink) Old 04-12-2013, 01:54 PM
aka Smokymtnvulcan
 
Ablerider's Avatar
 
Join Date: Sep 2009
Location: Western North Carolina
Posts: 41
iTrader: (0)
 
Are there two drain nipples on the Vulcan, one for each side? The fuel pours from someplace up kinda high on the right side. I'm having a hard time finding exactly where it comes from cause it only does it when the motor is running on one cylinder or cranking. I'm reluctant to crank it much with the fuel flying splashing! I know where the drain nipple is on the left side, is that the only one?

VROC #28359 Murphy NC
Patriot Guard Rider
US Army (Retired)
NC Law Enf (Retired)
VN750A3 New RR, New Stator, New Tires, Cleaned Carbs, New Choke Cable, Degoated and Marbled, replaced ACCT with MCCT, Custom LED Signals F&R, Custom Luggage Rack.
Did Tail of the Dragon in 1972 and again 07/2011
I like pipes I can hear!
I wear leather so I won't hurt too bad!
I wear a half helmet so I can see and hear better!
Not a poser, not an outlaw biker, JUST ME!
Ablerider is offline  
post #6 of 49 (permalink) Old 04-12-2013, 03:53 PM Thread Starter
Registered User
 
Join Date: Aug 2011
Location: GreenwoodFrickinLakeNY
Posts: 10,354
iTrader: (8)
   
One on each carb, on the bottom, with a screw to open/close.





Wolfie is offline  
post #7 of 49 (permalink) Old 04-12-2013, 05:30 PM
Prowling Tiger
 
blazblu82's Avatar
 
Join Date: Apr 2012
Posts: 2,048
iTrader: (4)
 
Quote:
Originally Posted by Ablerider View Post
Are there two drain nipples on the Vulcan, one for each side? The fuel pours from someplace up kinda high on the right side. I'm having a hard time finding exactly where it comes from cause it only does it when the motor is running on one cylinder or cranking. I'm reluctant to crank it much with the fuel flying splashing! I know where the drain nipple is on the left side, is that the only one?
And guess what, you get to finger them both!

I'll have to do this when I get my 750 back tomorrow. In fact, both carbs need a tear down and rebuild.
blazblu82 is offline  
post #8 of 49 (permalink) Old 04-14-2013, 08:34 PM
aka Smokymtnvulcan
 
Ablerider's Avatar
 
Join Date: Sep 2009
Location: Western North Carolina
Posts: 41
iTrader: (0)
 
Thanks guys, let the fingering begin!

VROC #28359 Murphy NC
Patriot Guard Rider
US Army (Retired)
NC Law Enf (Retired)
VN750A3 New RR, New Stator, New Tires, Cleaned Carbs, New Choke Cable, Degoated and Marbled, replaced ACCT with MCCT, Custom LED Signals F&R, Custom Luggage Rack.
Did Tail of the Dragon in 1972 and again 07/2011
I like pipes I can hear!
I wear leather so I won't hurt too bad!
I wear a half helmet so I can see and hear better!
Not a poser, not an outlaw biker, JUST ME!
Ablerider is offline  
post #9 of 49 (permalink) Old 04-14-2013, 09:33 PM
Old Truck Junkie
 
niterider's Avatar
 
Join Date: Jul 2007
Location: Roby Texas
Posts: 4,130
iTrader: (15)
 
I did all the easy fixes first. Checked and cleaned petcock ( had bug remains in it.) Removed and blow out fuel lines and filters. Checked the carb vent hose. Checked the vaccuum hose. And lastly removed and cleaned carbs. Main problem was that the carbs were stopped up. 9k in 3rd marking 90 mph on speedo.

02 honda sabre 1100
niterider is offline  
post #10 of 49 (permalink) Old 04-25-2013, 05:48 PM
Prowling Tiger
 
blazblu82's Avatar
 
Join Date: Apr 2012
Posts: 2,048
iTrader: (4)
 
I finally did this the other weekend and the rear jug seems to cold-idle better than before. Still need to back flow some seafoam and let it sit; but overall easy process once I found a hose to fit the nipple.

I only understand what I don't understand.
blazblu82 is offline  
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