Rear cylinder will not fire - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
Includes Electrical mods, Lights, Stator,
Rectifier, Diagrams, etc

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 21 (permalink) Old 12-04-2015, 12:44 AM Thread Starter
Junior Member
 
Join Date: Dec 2015
Posts: 5
iTrader: (0)
 
Rear cylinder will not fire

I am getting no spark on my rear cylinder I have checked everything I can think of hopefully someone can shed some light ... Bike is a 2001 vn750 it was having troubles with not firing when the bike warmed up before so I went to do a pickup coil mod and a wire broke off the pickup coil so I bought a new one ohmed out great installed it and now the rear cylinder won't fire at all both pickups ohms are correct switched coils still front fires rear doesn't changed wires from front to back still no spark on the rear now the pickup I put on was off a 88 vn 750 and I just clipped wires and soldered and used shrink wrap instead of putting in both new pickups can someone please tell me what else to check or something before I set it on fire lol thanks guys
Camshaft is offline  
Sponsored Links
Advertisement
 
post #2 of 21 (permalink) Old 12-04-2015, 12:59 AM
Crowley
 
crowley1027's Avatar
 
Join Date: Feb 2014
Location: Southern RI
Posts: 1,263
iTrader: (0)
 
Check your spark plugs first. Figure out the condition of the rear plugs in particular. check the ignition coil that is bolted to the front of the battery box (I don't know any troubleshooting off the top of my head for that - I think you check voltage at each terminal while grounded to frame).


Pull the plug and ground it reliably to the something. Try different grounds, I've found some spots to be no good for ground. Make sure to ground out both plugs.

If indeed there is no spark from either, it's certainly electrical. It's just a matter of going to a starting point, and moving forward.
crowley1027 is offline  
post #3 of 21 (permalink) Old 12-04-2015, 03:04 AM Thread Starter
Junior Member
 
Join Date: Dec 2015
Posts: 5
iTrader: (0)
 
I have checked the coil also have checked continuity of the wires and plugs work fine in the front cylinder they are fine the wires going to the coil 12v on one and the other is fire signal anyways to bypass those or check for shorts?
Camshaft is offline  
 
post #4 of 21 (permalink) Old 12-04-2015, 06:12 AM
FREEBIRDS MC CENTRAL NY
 
OleDirtyDoc's Avatar
 
Join Date: May 2011
Location: Norwich,NY
Posts: 15,868
iTrader: (0)
     
Garage
Send a message via Yahoo to OleDirtyDoc
Try swapping coils

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 #5 of 21 (permalink) Old 12-04-2015, 07:20 AM
1986 VN750
 
thtanner's Avatar
 
Join Date: Nov 2011
Location: Dana Point, CA
Posts: 3,255
iTrader: (8)
 
Garage
Since you swapped igniton coils, did the bypass, etc, I am wondering if your pickup coil wire has been damaged for the rear cyl. Should be in the bundle of wires coming out of the stator cover, not the 3 for the stator but the other set of wires. There are also ohm tests for the pickup coils. Worth doing that to see if you had a issue with the wire for the rear pickup.

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


1990 Kawasaki Vulcan 750

1998 Honda VFR800 FI

2014 Honda VFR800F

1989 Pontiac Firebird Formula 350
thtanner is offline  
post #6 of 21 (permalink) Old 12-04-2015, 07:53 AM
FREEBIRDS MC CENTRAL NY
 
OleDirtyDoc's Avatar
 
Join Date: May 2011
Location: Norwich,NY
Posts: 15,868
iTrader: (0)
     
Garage
Send a message via Yahoo to OleDirtyDoc
Quote:
Originally Posted by OleDirtyDoc View Post
Try swapping coils
I need to learn how to read

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 21 (permalink) Old 12-04-2015, 10:10 AM Thread Starter
Junior Member
 
Join Date: Dec 2015
Posts: 5
iTrader: (0)
 
I already tested the pickup coils they ohm out good
Camshaft is offline  
post #8 of 21 (permalink) Old 12-04-2015, 10:23 AM
Crowley
 
crowley1027's Avatar
 
Join Date: Feb 2014
Location: Southern RI
Posts: 1,263
iTrader: (0)
 
Have you tried pulling a rear plug, and grounding it out with the wire attached while cranking?
crowley1027 is offline  
post #9 of 21 (permalink) Old 12-04-2015, 01:42 PM
Old Fart
 
Knifemaker's Avatar
 
Join Date: Jun 2004
Location: Catawissa, MO
Posts: 11,565
iTrader: (4)
     
Garage
When you switched coils, did you switch the plug wires too? Perhaps it's a bad spark plug lead....

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 #10 of 21 (permalink) Old 12-04-2015, 02:05 PM Thread Starter
Junior Member
 
Join Date: Dec 2015
Posts: 5
iTrader: (0)
 
Yes and yes I also check continuity on all 4 wires to be sure they are all good...I'm guessing it's bad wiring somewhere could the cdi box make it only fire the one cylinder
Camshaft 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