Electrical Short? Engine Cutting out - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 24 (permalink) Old 05-23-2010, 10:27 PM Thread Starter
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Electrical Short? Engine Cutting out

The last two days I have gone for a ride my VN750 it has began to act up once the engine has been ran at highway speed for about 10 minutes. The engine cuts out just for a brief second repeatedly over and over and backfires a lot. It really makes the bike jerk a lot and the tach needle jumps from 4-5K real erratic. I noticed tonight that when it starts happening if I turn on the turn signals it aggervates the problem. The turn signal indicator lamp also flashes real erratic rather than flashing smoothly. It almost seems as if there is an electrical short that is causing the problem. Also, after an episode of this when I get the bike home and park it for a few minutes the oil and neutal lights don't come on when I turn the key to on. The first time this happened I thought maybe a fuse had blown so I checked all the fuses and none were bad. I let the bike set for about an hour and then tried the key again and everything was fine. Anybody have any ideas on this one?
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post #2 of 24 (permalink) Old 05-23-2010, 10:53 PM
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have you checked the ground wires from battery to frame?
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post #3 of 24 (permalink) Old 05-24-2010, 09:47 PM Thread Starter
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I did a quick visual inspection and they were tight and there were no visible signs of corrosion but I think I will take them loose and clean under the connections just to make sure. Thanks for the suggestion!
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post #4 of 24 (permalink) Old 05-24-2010, 09:53 PM
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Quote:
Originally Posted by Rickt54 View Post
The last two days I have gone for a ride my VN750 it has began to act up once the engine has been ran at highway speed for about 10 minutes. The engine cuts out just for a brief second repeatedly over and over and backfires a lot. It really makes the bike jerk a lot and the tach needle jumps from 4-5K real erratic. I noticed tonight that when it starts happening if I turn on the turn signals it aggervates the problem. The turn signal indicator lamp also flashes real erratic rather than flashing smoothly. It almost seems as if there is an electrical short that is causing the problem. Also, after an episode of this when I get the bike home and park it for a few minutes the oil and neutal lights don't come on when I turn the key to on. The first time this happened I thought maybe a fuse had blown so I checked all the fuses and none were bad. I let the bike set for about an hour and then tried the key again and everything was fine. Anybody have any ideas on this one?
Check all battery and ground connections but it sounds like the ignition switch is the problem.

https://www.vn750.com/forum/showthrea...gnition+switch


85 VN700 "Old Yella"

REBUILT ENGINE
CUSTOM PAINT
VANCE & HINES CRUZERS
EAR SHAVED AND RE-JETTED W/K&N'S
DUNLOP ELITE K591 FRONT & REAR
VOLTMETER
SYNTHETIC BRAKE FLUID
SYNTHETIC OIL & GEAR LUBE
PLEXISTAR 2 WINDSHIELD
SPLINES LUBED
ACCT'S GREASED W/TOC SPRINGS
COASTERD
LEATHER SADDLE BAGS
LEATHER TOOL AND ROLL BAG
PICKUP COILS GAPPED AT .018"
NGK CAP, WIRES, IRIDUMS
BARNETT FRICTION PLATES & SPRINGS
CUSTOM GRIPS, MIRRORS, LEVERS
ORIGINAL STATOR & R/R 14.5v
DEKA MF AGM ETX15L

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Last edited by lance328; 05-24-2010 at 09:56 PM.
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post #5 of 24 (permalink) Old 05-24-2010, 10:15 PM Thread Starter
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I thought it might possibly be the ignition switch but the bike is an 05 with only 1600 miles on it that has always been in a garage and never ridden in the rain. I guess it could have some corrosion though. If the ground connections do not help then my next step is to dissasemble the IG Sw and clean it. Thanks for the suggestions!

Last edited by Rickt54; 05-24-2010 at 10:18 PM.
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post #6 of 24 (permalink) Old 05-24-2010, 10:23 PM
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Quote:
Originally Posted by Rickt54 View Post
I thought it might possibly be the ignition switch but the bike is an 05 with only 1600 miles on it that has always been in a garage and never ridden in the rain. I guess it could have some corrosion though. If the ground connections do not help then my next step is to dissasemble the IG Sw and clean it. Thanks for the suggestions!
Since it is that new I would check All the connectors in the HL nacell and check the ignition switch connector by the neck.


85 VN700 "Old Yella"

REBUILT ENGINE
CUSTOM PAINT
VANCE & HINES CRUZERS
EAR SHAVED AND RE-JETTED W/K&N'S
DUNLOP ELITE K591 FRONT & REAR
VOLTMETER
SYNTHETIC BRAKE FLUID
SYNTHETIC OIL & GEAR LUBE
PLEXISTAR 2 WINDSHIELD
SPLINES LUBED
ACCT'S GREASED W/TOC SPRINGS
COASTERD
LEATHER SADDLE BAGS
LEATHER TOOL AND ROLL BAG
PICKUP COILS GAPPED AT .018"
NGK CAP, WIRES, IRIDUMS
BARNETT FRICTION PLATES & SPRINGS
CUSTOM GRIPS, MIRRORS, LEVERS
ORIGINAL STATOR & R/R 14.5v
DEKA MF AGM ETX15L

Best Auto/Moto Insurance | Motorcycle Protection Today | FREE Trade-In Quote
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post #7 of 24 (permalink) Old 05-25-2010, 01:40 PM Thread Starter
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HL nacell? I am kinda new here and don't speak all of the Vulcan lingo yet.
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post #8 of 24 (permalink) Old 05-25-2010, 02:41 PM
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I think he meant to type headlight bezel or bucket. That's behind the headlight in the bucket where several electrical connections are made.

Fergy
Kyle, TX VN750.com member #707 VROC#19556
2002 VN1500 Classic
Spline Lube Procedure, with photos, R/R Relocation and Coil Mod
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post #9 of 24 (permalink) Old 05-25-2010, 03:42 PM
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Quote:
Originally Posted by Rickt54 View Post
I thought it might possibly be the ignition switch but the bike is an 05 with only 1600 miles on it that has always been in a garage and never ridden in the rain. I guess it could have some corrosion though. If the ground connections do not help then my next step is to dissasemble the IG Sw and clean it. Thanks for the suggestions!
It sounds like the ignition to me also. Could be a loose wire inside the "hockey puck", most likely the white wire that connects at 2 points.
Yup, you guessed it, I had that problem with mine.


'86 Vulcan 750
Sold Dec. 2010... after many enjoyable rides.
27K miles and going strong thanks to vn750.com !
Windshield, Deluxe Soft Grips, Vista Cruise Control, Leather Saddle Bags,
High Back Rest, Luggage Rack, Highway Brackets & Pegs, NGK plugs and wires.
Ignition Issue - Fixed! Replaced Hockey puck.
ACCTs- Grambo Trick worked!! TOC ACCT Springs installed!
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post #10 of 24 (permalink) Old 05-26-2010, 10:00 PM Thread Starter
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I checked and cleaned all of the ground points. I am going to tear into the keyswitch hockey puck this weekend. Everyting is dead as a door nail. I am thinking broken wire at the keyswitch. I will also check the connectors in the headlamp housing. Thanks to all for the advice!!

Last edited by Rickt54; 05-28-2010 at 12:26 AM.
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