Engine stops running when it is warm/ hot. - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
VN750 General Discussion

 
LinkBack Thread Tools Display Modes
post #1 of 9 (permalink) Old 11-10-2015, 07:47 AM Thread Starter
Junior Member
 
Join Date: Nov 2015
Posts: 2
iTrader: (0)
 
Unhappy Engine stops running when it is warm/ hot.

Hello,

I am a Dutch guy who bought my Vulcan 750 in may this year (+/- 17.000 Mile)
The problem with my Vulcan 750 1992 is as follows.
It is starting quite quickly (new battery), but after driving a lot of miles (when the engine is warm/ hot) it is starting to run on only 1 cylinder and not much later it stops completely.
After cooling down a while it is running again, but after a few miles the problem is back.
What can this be and how to solve this problem?
Kawad is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 11-10-2015, 09:59 AM
2014 KLR 650!
 
Goofyfoot2001's Avatar
 
Join Date: Jun 2013
Location: Tega Cay, SC
Posts: 3,359
iTrader: (1)
 
Are you sure it's not Poogs (Phantom out of gas syndrome) When it happens is the tank around half full? Next time it starts to run funny, pull over and pop the gas cap and then put it back. Does the bike now run better?
Goofyfoot2001 is offline  
post #3 of 9 (permalink) Old 11-18-2015, 08:38 AM Thread Starter
Junior Member
 
Join Date: Nov 2015
Posts: 2
iTrader: (0)
 
No, I have tried your solution several times, but is does not work...
So far I tried a "new" bobine and ignition-unit to, but the problem still remaines...
Kawad is offline  
 
post #4 of 9 (permalink) Old 11-18-2015, 10:15 AM
Senior Member
 
Spockster's Avatar
 
Join Date: Nov 2012
Location: WV
Posts: 6,483
iTrader: (5)
   
Question

Quote:
Originally Posted by Kawad View Post
No, I have tried your solution several times, but is does not work...
So far I tried a "new" bobine and ignition-unit to, but the problem still remaines...
Not familiar with 'bobine' or which ignition unit you replaced, can you describe?

Check to see if the bike is charging when hot. Does the starter turn normally when the engine has stalled?

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 #5 of 9 (permalink) Old 11-18-2015, 10:20 AM
Senior Member
 
Spockster's Avatar
 
Join Date: Nov 2012
Location: WV
Posts: 6,483
iTrader: (5)
   
Could also check the petcock when it has stalled, might be losing fuel flow there, but not due to POOGS..

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 #6 of 9 (permalink) Old 11-18-2015, 01:26 PM
FREEBIRDS MC CENTRAL NY
 
OleDirtyDoc's Avatar
 
Join Date: May 2011
Location: Norwich,NY
Posts: 15,873
iTrader: (0)
     
Garage
Send a message via Yahoo to OleDirtyDoc
Is it running hot?do you smell gas?

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 #7 of 9 (permalink) Old 11-18-2015, 06:42 PM
Members who have donated towards server costs
 
Join Date: Nov 2007
Location: Chandler, Arizona
Posts: 2,848
iTrader: (0)
 
If it starts good, and runs good for awhile, that eliminates quite a few things. The only things left are gas and ignition. Either the ignition is cutting out, or something is stopping the flow of gas. My Vulcan 750 (both of them actually, I've had 2, a '93, and now an '02) have always had the habit of sometimes starting up on one cylinder, then several seconds the other cylinder kicks in. It doesn't do that all the time, but often enough to notice. Even after I completely overhauled the carbs it still does it. I never found the cause. The '93 had an issue right after I bought it new where the rear cylinder would flood out. It was under warranty, but I did not trust the dealer to work on it after an incident with another bike, so I did it myself. I found the float in the rear carb had a piece of flashing sticking out where the seam was molded together, and it would occasionally catch on the carb body. I trimmed it down, and it ran fine.

You said it starts running on one cylinder, then the other one cuts out later. That means something that can affect one cylinder at the time. Possibly the carbs or pickup coils? It may be difficult to find, since it happens intermittently. By the time you can check it, the problem may have disappeared. Even though the petcock feeds both carbs, I would make sure you are getting a good flow of fuel from that. If you are not in the U.S., I'm assuming you don't have to deal with alcohol laced gas. Has the bike had this problem ever since you bought it? Has it gotten any better or worse? Have you noticed anything else odd? How long do you have to ride it before this issue happens?

I am a motorcyclist, NOT a biker.


1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike
VN750Rider/Jerry is offline  
post #8 of 9 (permalink) Old 11-18-2015, 09:18 PM
FREEBIRDS MC CENTRAL NY
 
OleDirtyDoc's Avatar
 
Join Date: May 2011
Location: Norwich,NY
Posts: 15,873
iTrader: (0)
     
Garage
Send a message via Yahoo to OleDirtyDoc
Could possibly be a sticky float needle in the rear carb?mine had an issue similar and would flood out the rear cylinder and would run on one cylinder then cut out

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 #9 of 9 (permalink) Old 11-23-2015, 08:39 PM
Senior Member
 
Join Date: Feb 2014
Location: Clearwater, Fl
Posts: 102
iTrader: (0)
 
I had this problem plague my bike for over a year, turned out to be a simple kinked/frayed wire. Trace ALL your wires coming from the stator to their endpoints. I suffered with it for so long because i skipped this step.

May not be the solution for you but will save you loads of cash and headache if it is.

2006 Vulcan 750
Ear Shaved
Re-jetted
ACCT --> MCCT Conversion
TW200 Petcock
www.michaelcmichaeldo.com
mcharles13 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