It started again. got video this time. - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
VN750 General Discussion

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 23 (permalink) Old 08-05-2014, 08:46 PM Thread Starter
Senior Member
 
Join Date: Feb 2014
Location: Clearwater, Fl
Posts: 102
iTrader: (0)
 
It started again. got video this time.

My bike ran great for 3 weeks and has resumed stalling, surging, sputtering and backfiring. It is far worse than it was before. It will only idle when I crank it way up and stalls like crazy.

I couldn't get the surging at idle on the video as I was in traffic and didn't have much time.

Unhappy bike: http://youtu.be/1jri45MED9U

Any ideas? I want this fixed once and for all as it cut off on me today while I was crossing a busy road and I am now a few bricks lighter.

The backfiring is MUCH louder this time around. Before it was a loud popping now it is like gunshots.
mcharles13 is offline  
Sponsored Links
Advertisement
 
post #2 of 23 (permalink) Old 08-06-2014, 06:16 AM
Senior Member
 
shark88's Avatar
 
Join Date: Jan 2008
Location: Central, PA
Posts: 2,484
iTrader: (27)
 
Garage
Do you use any gas treatment like Seafoam. A lot of times is a carb issue.

"Show me a man who makes no mistakes, and I'll show you a man who doesn't do things." Theodore Roosevelt."

2007 Victory Kingpin
Current projects - 1986 VN750 & 1988 EL250
shark88 is offline  
post #3 of 23 (permalink) Old 08-06-2014, 10:57 AM
Old Fart
 
Knifemaker's Avatar
 
Join Date: Jun 2004
Location: Catawissa, MO
Posts: 11,602
iTrader: (4)
     
Garage
Does sound like a carb issue. SeaFoam might help... Cleaning the carbs of course won't last if your gas tank is full of crud. You might want to check that out too.

If You Are Not Sure If I Am Joking or Not....I AM !!Photos:
http://www.flickr.com/photos/knifemaker1954/sets/
Knifemaker is offline  
 
post #4 of 23 (permalink) Old 08-06-2014, 12:23 PM
2014 KLR 650!
 
Goofyfoot2001's Avatar
 
Join Date: Jun 2013
Location: Tega Cay, SC
Posts: 3,359
iTrader: (1)
 
prolly air leak. Spray some wd-40 at the boots and see if it changes pitch.

2014 Kawasaki KLR 650
Back to the Kawa World
Goofyfoot2001 is offline  
post #5 of 23 (permalink) Old 08-06-2014, 12:30 PM
Super Moderator
 
Join Date: Feb 2013
Location: SW Florida
Posts: 2,442
iTrader: (5)
 
yea, if them boots are not sealing right (meaning lined up and angled correctly) your gonna have problems, including vacuum leaks.

2005 VN750

Sold 11-27-17
michiganteddybear is offline  
post #6 of 23 (permalink) Old 08-06-2014, 02:07 PM Thread Starter
Senior Member
 
Join Date: Feb 2014
Location: Clearwater, Fl
Posts: 102
iTrader: (0)
 
I am earshaved but I'll try.
mcharles13 is offline  
post #7 of 23 (permalink) Old 08-06-2014, 02:13 PM
Super Moderator
 
Join Date: Feb 2013
Location: SW Florida
Posts: 2,442
iTrader: (5)
 
the boots between the carbs and the heads can be leaking.

2005 VN750

Sold 11-27-17
michiganteddybear is offline  
post #8 of 23 (permalink) Old 08-06-2014, 02:13 PM
2014 KLR 650!
 
Goofyfoot2001's Avatar
 
Join Date: Jun 2013
Location: Tega Cay, SC
Posts: 3,359
iTrader: (1)
 
Quote:
Originally Posted by mcharles13 View Post
I am earshaved but I'll try.
Earshave doesn't matter. Actually will make it easier to check. On the boots there is a little nub of rubber that should line up with a little bump on the top of the cylinder intake. Like a little half a pea size.

You can see it in this p[icture at the bottom of the boot. looks like a mistake almost. But that diggle hanging off down there, lines up with s similar bump on the cylinder head.


2014 Kawasaki KLR 650
Back to the Kawa World

Last edited by Goofyfoot2001; 08-06-2014 at 02:16 PM.
Goofyfoot2001 is offline  
post #9 of 23 (permalink) Old 08-06-2014, 10:50 PM Thread Starter
Senior Member
 
Join Date: Feb 2014
Location: Clearwater, Fl
Posts: 102
iTrader: (0)
 
Performed the WD40 test and nothing happened. Sprayed it around the boots as instructed.

Also performed the blowback procedure. I am unsure if it did anything substantial.

I did notice when i took off the pods that the front carb slide and "mouth" area was soaked in fuel. I've not seen this any of the other times that I looked at or removed the carbs.

I have attached 2 vids that i took after the blowback.

The first video i tried to capture the surging while riding. It was popping and light backfiring pretty badly just prior to the video. I think i captured some of it. As i rode it became less and less prevalent.

The 2nd video i was trying to show what it does at different RPMS and an annoying ticking noise that is on both jugs but more so the rear.

I am planning on doing the ACCT to MCCT conversion and am wondering if I NEED to do it and if the ticking will go away if i do.

http://youtu.be/unwqWfIqpzc

http://youtu.be/p-0xvOeymYA

,mike
mcharles13 is offline  
post #10 of 23 (permalink) Old 08-06-2014, 11:30 PM
ass hole extaordinaire
 
new rider 9984's Avatar
 
Join Date: May 2012
Location: Sulphur Springs TX
Posts: 3,780
iTrader: (7)
 
i cant tell about the surging issues but i can say that you need to do the acct conversion and it will help us diag the other issues

Quote:
Originally Posted by denny6006 View Post
Sucks getting old but it beats not getting old.

i got my helmet but it sure makes licking the windows a chore

cell phone number for anyone who needs it 214-516-1738

photobucket link
http://s1066.photobucket.com/user/newrider9984/library/
new rider 9984 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