Bike dies when turning handle bars to the right - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
Includes Electrical mods, Lights, Stator,
Rectifier, Diagrams, etc

 3Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 25 (permalink) Old 07-06-2019, 08:41 AM Thread Starter
Senior Member
 
Join Date: Jun 2019
Location: Iowa
Posts: 101
iTrader: (0)
 
Bike dies when turning handle bars to the right

I had posted this originally in the engine forum, but it is electrical. The back story is that the bike would die whenever I turned the handlebars to the right. Several people suggested to check the left side wiring harnesses (makes complete sense, as it is adding strain there when turning left). I could not get the problem to duplicate yesterday, in the 95 degree heat, but I got it this morning when it was 70. Maybe the harness was more pliable yesterday in the heat. I have taken a video of the issue, and it has a relay like click when I get to the “dead zone”. Maybe kill switch? Maybe ignition? You’ll need audio for this, but it has a distinct relay sound coming from the right side of the bike. If the video doesn’t have sound for you, click the “v” in the lower left side of the video. It’ll take you to the page

Sent from my iPhone using Tapatalk

'08 Road King Classic
'86 VN750 with the following work done to it, after sitting for 19 years:
  • Blue Wire Mod
  • Two Wire Mod
  • Coil Mod
  • 2nd Coil Mod
  • Ear Shave
  • 42/142 Jets
  • Debadged
  • Rattle Can Flat Paint
  • Exhaust Coming
  • K&N Filters
  • Carbs Cleaned
  • Petcock Rebuilt (unsucessfully)
  • Coolant Flushed
  • Rear Spline Lube
REV 2:9
www.voat.co

Last edited by MSattler; 07-06-2019 at 08:46 AM.
MSattler is online now  
Sponsored Links
Advertisement
 
post #2 of 25 (permalink) Old 07-06-2019, 09:11 AM
2003 Vulcan 750/Sidecar
 
Hench's Avatar
 
Join Date: Nov 2018
Location: Arkansas
Posts: 83
iTrader: (0)
 
Where is the relay for your coil mod? Is that it by the battery? Are the terminals fully insulated? No bare metal on the connections or pins?

2003 VN750
Velorex 562 sidecar w/trunk
2-wire mod
Headlight power switch
Manual fan switch
Shingigen SH775
Blue wire mod
Yellow wire mod
RLU removed
RR moved
Voltmeter relay wired
Coils direct wired w/relay
TOC MCCTs
handicap mods:
extended foot shift
heel shifter
extended brake pedal
Hench is online now  
post #3 of 25 (permalink) Old 07-06-2019, 09:24 AM Thread Starter
Senior Member
 
Join Date: Jun 2019
Location: Iowa
Posts: 101
iTrader: (0)
 
Bike dies when turning handle bars to the right

Quote:
Originally Posted by Hench View Post
Where is the relay for your coil mod? Is that it by the battery? Are the terminals fully insulated? No bare metal on the connections or pins?


That is it by the battery. Where you have the washers and the bolt. They are not fully insulated, just the female connectors attached to the pin. I caught a sheet metal screw in the front tire, and I was going to get a patch kit from O’Reillys. I can get some heat shrink there. It sounds identical to the relay that turns on when the ignition is turned on. So that would make sense, since the rear coil is the trigger. To test, I should be able to disconnect the trigger from the relay to see if that is it.
Update - I pulled off the trigger and sure enough, it stopped doing that. So... is it as simple as insulating the female connectors? I just filled the tank, and I do not feel like draining it for the umpteenth time. I have a new petcock kit coming, so I will clean the fuel gauge, run new wire and see if that will fix that gremlin.


Sent from my iPhone using Tapatalk

'08 Road King Classic
'86 VN750 with the following work done to it, after sitting for 19 years:
  • Blue Wire Mod
  • Two Wire Mod
  • Coil Mod
  • 2nd Coil Mod
  • Ear Shave
  • 42/142 Jets
  • Debadged
  • Rattle Can Flat Paint
  • Exhaust Coming
  • K&N Filters
  • Carbs Cleaned
  • Petcock Rebuilt (unsucessfully)
  • Coolant Flushed
  • Rear Spline Lube
REV 2:9
www.voat.co

Last edited by MSattler; 07-06-2019 at 09:31 AM.
MSattler is online now  
 
post #4 of 25 (permalink) Old 07-06-2019, 09:32 AM
2003 Vulcan 750/Sidecar
 
Hench's Avatar
 
Join Date: Nov 2018
Location: Arkansas
Posts: 83
iTrader: (0)
 
Insulate the terminals by wrapping electrical tape around them and the relay. If the relay is loose and the bike only shuts off going up/down hill as you said in your previous thread the relay may be swinging and shorting against the frame.

2003 VN750
Velorex 562 sidecar w/trunk
2-wire mod
Headlight power switch
Manual fan switch
Shingigen SH775
Blue wire mod
Yellow wire mod
RLU removed
RR moved
Voltmeter relay wired
Coils direct wired w/relay
TOC MCCTs
handicap mods:
extended foot shift
heel shifter
extended brake pedal
Hench is online now  
post #5 of 25 (permalink) Old 07-06-2019, 10:12 AM Thread Starter
Senior Member
 
Join Date: Jun 2019
Location: Iowa
Posts: 101
iTrader: (0)
 
Quote:
Originally Posted by Hench View Post
Insulate the terminals by wrapping electrical tape around them and the relay. If the relay is loose and the bike only shuts off going up/down hill as you said in your previous thread the relay may be swinging and shorting against the frame.


I will do that. The relay is tight though, and it felt like it would break if I pushed on it much harder to move it. It shuts off when turning the handle bars. So I think something is being stretched and grounding out.


Sent from my iPhone using Tapatalk

'08 Road King Classic
'86 VN750 with the following work done to it, after sitting for 19 years:
  • Blue Wire Mod
  • Two Wire Mod
  • Coil Mod
  • 2nd Coil Mod
  • Ear Shave
  • 42/142 Jets
  • Debadged
  • Rattle Can Flat Paint
  • Exhaust Coming
  • K&N Filters
  • Carbs Cleaned
  • Petcock Rebuilt (unsucessfully)
  • Coolant Flushed
  • Rear Spline Lube
REV 2:9
www.voat.co
MSattler is online now  
post #6 of 25 (permalink) Old 07-06-2019, 10:24 AM
2003 Vulcan 750/Sidecar
 
Hench's Avatar
 
Join Date: Nov 2018
Location: Arkansas
Posts: 83
iTrader: (0)
 
If the relay pins are exposed it might not take much movement to short it open. Wrap it and try it.

If no improvement, back to the wiring under the neck covers. You mentioned corroded wires. It may be you have a wire that is broken in the insulation and not visible as exposed. When you turn right it pulls apart in the insulation.

2003 VN750
Velorex 562 sidecar w/trunk
2-wire mod
Headlight power switch
Manual fan switch
Shingigen SH775
Blue wire mod
Yellow wire mod
RLU removed
RR moved
Voltmeter relay wired
Coils direct wired w/relay
TOC MCCTs
handicap mods:
extended foot shift
heel shifter
extended brake pedal
Hench is online now  
post #7 of 25 (permalink) Old 07-06-2019, 02:30 PM Thread Starter
Senior Member
 
Join Date: Jun 2019
Location: Iowa
Posts: 101
iTrader: (0)
 
Quote:
Originally Posted by Hench View Post
If the relay pins are exposed it might not take much movement to short it open. Wrap it and try it.



If no improvement, back to the wiring under the neck covers. You mentioned corroded wires. It may be you have a wire that is broken in the insulation and not visible as exposed. When you turn right it pulls apart in the insulation.


It is grounding out the starter. The button does nothing after the relay clicks. I have insulated the whole mod very with electrical tape, but nothing works. The battery jumps up to 14vdc on idle and then drops to like 13.5 at 4K rpm. Thoughts? I have the stock r/r


Sent from my iPhone using Tapatalk

'08 Road King Classic
'86 VN750 with the following work done to it, after sitting for 19 years:
  • Blue Wire Mod
  • Two Wire Mod
  • Coil Mod
  • 2nd Coil Mod
  • Ear Shave
  • 42/142 Jets
  • Debadged
  • Rattle Can Flat Paint
  • Exhaust Coming
  • K&N Filters
  • Carbs Cleaned
  • Petcock Rebuilt (unsucessfully)
  • Coolant Flushed
  • Rear Spline Lube
REV 2:9
www.voat.co
MSattler is online now  
post #8 of 25 (permalink) Old 07-06-2019, 03:04 PM
2003 Vulcan 750/Sidecar
 
Hench's Avatar
 
Join Date: Nov 2018
Location: Arkansas
Posts: 83
iTrader: (0)
 
Working from faulty memory here. I think the coil wiring shows connecting the positive coil wire to the relay and on to the coils as connected to the starter relay positive. Try connecting that wire directly to the battery. Leave the relay trigger wires as is.

14v at idle when just started RR may be recovering the battery and then reving it is clipping voltage to a lower charging rate. If you battery shows 12.8V after sitting idle for 24 hours I wouldn't worry about stator/rr for now. Let's find the starting problem for now.

BTW, is the RR still under the battery box?

2003 VN750
Velorex 562 sidecar w/trunk
2-wire mod
Headlight power switch
Manual fan switch
Shingigen SH775
Blue wire mod
Yellow wire mod
RLU removed
RR moved
Voltmeter relay wired
Coils direct wired w/relay
TOC MCCTs
handicap mods:
extended foot shift
heel shifter
extended brake pedal

Last edited by Hench; 07-06-2019 at 03:14 PM.
Hench is online now  
post #9 of 25 (permalink) Old 07-06-2019, 04:27 PM Thread Starter
Senior Member
 
Join Date: Jun 2019
Location: Iowa
Posts: 101
iTrader: (0)
 
Quote:
Originally Posted by Hench View Post
Working from faulty memory here. I think the coil wiring shows connecting the positive coil wire to the relay and on to the coils as connected to the starter relay positive. Try connecting that wire directly to the battery. Leave the relay trigger wires as is.

14v at idle when just started RR may be recovering the battery and then reving it is clipping voltage to a lower charging rate. If you battery shows 12.8V after sitting idle for 24 hours I wouldn't worry about stator/rr for now. Let's find the starting problem for now.

BTW, is the RR still under the battery box?


Yes it is still in the stock location. I have the red wire that connects the two coils wired directly to the battery. That was the mistake I made before, I had it grounded


Sent from my iPhone using Tapatalk

'08 Road King Classic
'86 VN750 with the following work done to it, after sitting for 19 years:
  • Blue Wire Mod
  • Two Wire Mod
  • Coil Mod
  • 2nd Coil Mod
  • Ear Shave
  • 42/142 Jets
  • Debadged
  • Rattle Can Flat Paint
  • Exhaust Coming
  • K&N Filters
  • Carbs Cleaned
  • Petcock Rebuilt (unsucessfully)
  • Coolant Flushed
  • Rear Spline Lube
REV 2:9
www.voat.co
MSattler is online now  
post #10 of 25 (permalink) Old 07-06-2019, 06:38 PM
2003 Vulcan 750/Sidecar
 
Hench's Avatar
 
Join Date: Nov 2018
Location: Arkansas
Posts: 83
iTrader: (0)
 
About the battery voltages are those readings from when the bike would start?

Is the not starting intermittent or solid failure now?

Have you checked the battery voltage after sitting for a couple of hours. If so what was it? You have a wet cell battery if I recall correctly.

2003 VN750
Velorex 562 sidecar w/trunk
2-wire mod
Headlight power switch
Manual fan switch
Shingigen SH775
Blue wire mod
Yellow wire mod
RLU removed
RR moved
Voltmeter relay wired
Coils direct wired w/relay
TOC MCCTs
handicap mods:
extended foot shift
heel shifter
extended brake pedal
Hench is online now  
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