VN750 Engine Cutting Out - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
VN750 General Discussion

 
LinkBack Thread Tools Display Modes
post #1 of 9 (permalink) Old 11-16-2004, 02:45 PM Thread Starter
 
Join Date: Nov 2004
Posts: 3
iTrader: (0)
 
VN750 Engine Cutting Out

My '95 is in the shop, but I anticipate a "cannot duplicate problem" response for my problems. Any suggestions that I could get would be greatly appreciated. Here's my problem description as best as I can describe it:

The engine is cutting out intermittently with no common speed or action

It has happened at idle, and at various speeds

The tachometer instantly drops to zero and the bike loses speed quickly



If the cutout is short, the bike will jumpstart itself at driving speeds. Other times the bike will just roll to a stop and the ignition will need to be turned off and then on again.



The starter does not start the bike when this is happening, stopped or moving



When the bike is dead, turning the ignition off and then back on corrects the problem and allows the bike to be started with the starter.

When dead, with the ignition still on, the lights (oil, blinkers, etc.) remain on as though the ignition is on. However, the starter wont work, and the bike wont jump itself if moving in this condition.



The length of the cutout varies from a second or two or sometimes until the ignition is cycled off and then on.



Sometimes the bike can be driven for miles without problems. Other times the problem has happened repeatedly within a very short distance.


Thanks in advance!!
amichael is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 11-16-2004, 09:01 PM
Member
 
nitrofish420's Avatar
 
Join Date: Sep 2004
Location: Maryland
Posts: 82
iTrader: (0)
 
Re: VN750 Engine Cutting Out

My first guess would be your igniton switch. You might try checking your connections at the switch or subsitiuting a known good part, if possible. I'm thinking by shutting it off and back on, perhaps it reconnects a worn contact within the switch that causes it to cut off.
nitrofish420 is offline  
post #3 of 9 (permalink) Old 11-17-2004, 02:32 PM
 
Join Date: Jun 2004
Posts: 62
iTrader: (0)
 
Re: VN750 Engine Cutting Out

I recall someone saying something about their KEYS were actually grounding out against the frame. Do you have a big honking ring full of keys in that ignition or just a singular Vulcan key and nothing more? It seems to sound like a short to ground.

gYpSy also has some comments about the ignition circuit grounding out.
http://ourworld.cs.com/Moonmist115/vulcanwebsite.html

Just a "d'oh" checklist I've thought of too: are you sure you're not bumping the On / Off rocker switch with your right thumb (or could it have a bad connection?). Could you be bumping the kickstand safety switch with your left boot?
Syrinx is offline  
 
post #4 of 9 (permalink) Old 12-04-2004, 02:20 AM
 
Join Date: Dec 2004
Posts: 3
iTrader: (0)
 
Re: VN750 Engine Cutting Out

amichael,
I think you have a bad connection somewhere but you first have to prove that. Connect a jumper wire from the positive terminal on you battery to the RED wire on the ignitor. This is the power in wire for the ignitor. Normally power is run from the battery, through a 30amp fuse, through the key switch and then through the engine stop switch. So it could be any of these things; or none!?
In any case jumping them all out at once will shorten the diagnostic time.

Hope this helps.
Lex1982 is offline  
post #5 of 9 (permalink) Old 12-05-2004, 02:08 AM
Junior Member
 
Join Date: Sep 2004
Location: Salinas, CA
Posts: 8
iTrader: (0)
 
Re: VN750 Engine Cutting Out

I have had that problem a few times. Usually the problem was with the carburetor. I drained the floats on both carburetors using a clear plastic tube and an Allen wrench. Make sure you keep the gasoline that comes out away from hot engine and exaust parts. If you drain it into a white coffee cup, you may see some dark flaky stuff (very, very small) like dirt that may have been clogging your idle jets... When I have had the problem, that has solved it. It has always solved the problem for me... Good luck.
MCurlydastooge is offline  
post #6 of 9 (permalink) Old 12-05-2004, 03:33 PM
Senior Member
 
Sgt Mike's Avatar
 
Join Date: Nov 2004
Location: Hagerstown, Md
Posts: 115
iTrader: (0)
 
Re: VN750 Engine Cutting Out

AM;
Dont laugh, but not to long ago I was on a different forum with a rider complaining of problem that describes yours to a "T". A couple of readers suggested that his battery was low or weak. He charged the battery cleaned and tighten all connections, and that took care of his stalling/cutting out problem. Food for thought.
Sgt Mike is offline  
post #7 of 9 (permalink) Old 12-06-2004, 11:25 PM
Forum Faciliator
 
Red Baron's Avatar
 
Join Date: Jun 2004
Location: Binghamton, NY
Posts: 369
iTrader: (0)
 
Re: VN750 Engine Cutting Out

A weak battery is a frequent source of the vn750 running poorly. That is the always first thing to check into.

RB

Red Baron
Binghamton, NY
Alright Already, Lets Ride!!
Red Baron is offline  
post #8 of 9 (permalink) Old 02-06-2005, 02:43 PM
 
Join Date: Feb 2005
Posts: 1
iTrader: (0)
 
Re: VN750 Engine Cutting Out

I recently purchased a 2000 vn750 with the same problem. It was corrected by replacing the switch that cut off the engine when the kick stand is out and the clutch is released. Also the wire that goes from the switch to the kick stand was making ground somewhere in the bike's frame. It was corrected by a Certified Kawasaki Mechanic.

Good luck.
rene is offline  
post #9 of 9 (permalink) Old 03-01-2005, 01:07 PM
 
Join Date: Mar 2005
Posts: 3
iTrader: (0)
 
Re: VN750 Engine Cutting Out

I had a similar problem and traced it to the ignition switch. Since I bought my bike used, there's no telling if the previous owner kept a lot of keys on the bike key ring. After a time I noticed that simply bumping the key or even readjusting the headlight would disturb the switch or the cable and the bike would then have problems with cutting out or not starting. I was lucky to find a spare switch assembly on eBay and installed it in an hour (getting to the plugs is a little tricky). Problem solved, for now...check salvage places and eBay for used parts. If you can't wait, see about pricing a new switch- or you can remove your existing and see if there are obvious problems you can fix like a loose solder joint. My switch was totally shot so I replaced it.
fatimablush 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