Down a cylinder --- Help - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
VN750 General Discussion

LinkBack Thread Tools Display Modes
post #1 of 13 (permalink) Old 11-06-2006, 05:24 PM Thread Starter
Join Date: Jul 2006
Posts: 12
iTrader: (0)
Down a cylinder --- Help

Hi... Took a ride this morning and on my way home. I initially noticed a loss in power at 50MPH or so. It cleared up fairly quickly... or so I thought.

I came to a stop sign and when I was starting off from a stop, I was only running (barely) on one cylinder as long as I kept the revs up. Every once in a while, the other cylinder would fire and then quit.

I was close to home and made it there - at least I didn't get stranded. As soon as I stopped, the engine quit and I was unable to restart it - so I wasn't able to figure out which one was giving me the trouble.

After about 5 mins or so, I was able to restart and both cylinders are firing and the engine sounds fine. I didn't take it back out just in case..

Any folks out there have any idea where I should start looking?

Thanks in Advance,,

baw944 is offline  
Sponsored Links
post #2 of 13 (permalink) Old 11-06-2006, 06:17 PM
Uber Member
Join Date: Feb 2006
Location: Dallas, TX
Posts: 1,280
iTrader: (0)
Send a message via AIM to Hizzo3 Send a message via Yahoo to Hizzo3
how old is the bike? my first guess would be spark plug wires. check continuity, and verify a strong spark to the front and rear cyl. also check the plugs to see what condition they are in. next on the list would be carb related. there is also a small possiability it could be the charging system, but that is an easy check.

'04 Vn750
Currently Installed
nat'l cycle deflector shield
westco 12v30 MF, 30A/h w/ 350 CCA's w/ custom box
TOC stator cover w/ Frankenstator mod!
R/R relo

Soon to have (own or on order)
Mez's 110-FRT 170/80-Rear
Custom rear fender and tail light
Givi hard bags w/ custom rear turn signals

Band Engineer/Webmaster for Josey Contreras Tejano Band
Hizzo3 is offline  
post #3 of 13 (permalink) Old 11-06-2006, 06:29 PM
Join Date: Aug 2006
Posts: 699
iTrader: (1)
If I had to guess I would say it sounds like it could be a coil....not sure if theres a test for that other than checking spark.........anybody know?
TrashLord is offline  
post #4 of 13 (permalink) Old 11-06-2006, 06:33 PM
Ccspinner's Avatar
Join Date: Feb 2006
Location: Chicago land
Posts: 2,576
iTrader: (9)
Send a message via Yahoo to Ccspinner
Also could be a fuel problem, how much is in the tank and have you used Seafoam? That is what my bike does when it starts to run out of gas, one cylender quits first ususlly the front.

Chad Falstad "Hawk"
Vroc #17649
2011 HD Ultra Classic "angel"
2001 Nomad 1500 Sold March 2012
2001 VN 750 "Sold June with 2008 with 21,000""Serinity"
Ccspinner is offline  
post #5 of 13 (permalink) Old 11-06-2006, 06:43 PM Thread Starter
Join Date: Jul 2006
Posts: 12
iTrader: (0)
Thanks Guys.. The fuel gauge was showing 1/4 left and I thought it was fuel too and when it first happened, I switched to reserve with no luck.
The bike is a '93 - my first gut feel was a coil or plug wires. I'll check there first.

Thanks for the input

baw944 is offline  
post #6 of 13 (permalink) Old 11-06-2006, 07:22 PM
rnewell's Avatar
Join Date: Mar 2006
Location: New Jersey
Posts: 872
iTrader: (0)
Start it up in the dark, you will be able to see if any of the plug wires are arcing.

Ron from Jersey
2005 VN750
HellFire windshield
Kaw extended backrest
Cobra exhaust
Re-located stator wires
Side bags
15,000 Miles July/2012
It's PAID OFF ! May 2009
rnewell is offline  
post #7 of 13 (permalink) Old 11-06-2006, 07:52 PM
Join Date: Aug 2006
Posts: 699
iTrader: (1)
thats how I found mine....started it up at 4:15 am to go to work.
I had a GS750 with a bad would fire weak then sometimes good...the bike would actually launch forward on me when it did fire, was a trip riding thru town in traffic lol
TrashLord is offline  
post #8 of 13 (permalink) Old 11-06-2006, 08:08 PM
Once Banned
cegodsey's Avatar
Join Date: Jun 2006
Location: Bryant, Arkansas
Posts: 2,125
iTrader: (0)
If you can figure out which cylinder it is, you can physically swap the coils and see if it is a coil going out. Although it could be a plug wire, we have two per cylinder, so the cylinder wouldn't give out entirely. I think. If swapping the coils doesn't fix the problem, then that leaves the plug wires and the IC igniter. This is assuming that the carbs are ok. Run some seafoam through it if you haven't already. Let it sit overnight with the fuel/seafoam mixture in the carbs.

2000 A16
Drilled baffles
$65 leather saddle bags
Kuryaken grips
relocated R/R
25,000+ original owner miles
cegodsey is offline  
post #9 of 13 (permalink) Old 11-07-2006, 05:17 AM
and the Adventure Cycle
hyperbuzzin's Avatar
Join Date: Jun 2004
Location: Western PA
Posts: 6,138
iTrader: (1)
I've had something very similar to what you describe happen to me several times.
It'd happen once during a ride. I'd let it sit for a minute or two, then it'd fire up and run fine and wouldn't happen again for the remainder of a couple hundred mile ride.

Several folks here recommended opening the gas cap after it quit like that and listen for the sound of pressure releasing from the tank. Only problem is, it hasn't done it since I heard of that !?

Wish I could be of more help to ya, 'cause I know how frustrating it is when this happens.
Only thing I can say for sure, when my Vulcan did it, it always started after letting it sit a little while.

If ya do figure out what's causing your's to do it, please be sure to let us know.

AKA: Tim & 'The Adventure Cycle' VROC #24567, NEVROC, SteelCity VROC

"When life throws you curves,
Aim for the apex."

Author Unknown
hyperbuzzin is offline  
post #10 of 13 (permalink) Old 11-07-2006, 08:26 AM
Join Date: Feb 2006
Posts: 227
iTrader: (0)
A maintenance free battery fixed most of my bikes misfiring.
wwmkwood is offline  
Sponsored Links


Quick Reply

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


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

Email Address:


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