Lost Spark - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
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post #1 of 6 (permalink) Old 09-29-2009, 06:13 AM Thread Starter
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Lost Spark

Well, that's a fun way to start the morning. On my way into work this morning
I suddenly lost spark in the rear cylinder. It's still getting gas(I can smell it at the tail pipe) but it has no spark until about 4500 rpm. I limped the rest of the way to work and killed it. The engine cranks fine and will start on the one cylinder after cranking for about 5 or 6 seconds so I don't think my battery or charging system is the problem. The plug wires are in good shape and firmly attatched to the plugs. so, loose connection somewhere?? I'm hoping this one will be an easy fix so I can ride home instead of hunting for a trailer

edit: posting without coffee is bad. It's the front cyl not the rear.

Rook
Conway, AR
VROC # 30581
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2009 1700 Nomad (mine)
2003 VN750 "Prozac" (now hers)
25'000 miles at purchase
Coastered
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So, why is a raven like a writing desk?

Last edited by Rook; 09-29-2009 at 06:57 AM. Reason: mistake
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post #2 of 6 (permalink) Old 09-29-2009, 11:33 AM
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do u have a selection of tools to work with? check voltage at the coils... also wiggle around the key and see if its in the ignition switch... and i agree 100 percent on the connections i hope thats the case for ya ....



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post #3 of 6 (permalink) Old 09-29-2009, 12:22 PM
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The carb may be loading up. And once the the fuel evaps off a little it starts to fire again. Try seafoam.

02 honda sabre 1100
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post #4 of 6 (permalink) Old 09-29-2009, 01:00 PM Thread Starter
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copied from the VROC web forum: Also, that the throttle cables aren't rubbing on the right plug wire; not unknown on the 750.

Turn out that did it! the cables had rubbed part way through the plug wire insulation. I pushed them apart and it began to fire again. I'm still gonna pull the plugs and check all my connections tho' seems like now would be a good time

Rook
Conway, AR
VROC # 30581
WBRA #90237-1
2009 1700 Nomad (mine)
2003 VN750 "Prozac" (now hers)
25'000 miles at purchase
Coastered
Ears shaved
Cobra exhaust

So, why is a raven like a writing desk?
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post #5 of 6 (permalink) Old 09-29-2009, 01:05 PM
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I cut some short fuel hose lengths and then slit them open and put them around the throttle cables to prevent them from abrading the spark plug boot.

Also good for where your clutch and speedo cables touch the frame.

Scheherazade
'86 VN750
MF Battery, Iridium Plugs, RR relocated, Voltmeter, 170/80/15 Kenda Kruz rear tire, DIY Samsonite hard bags, DIY shaved seat with Beaded seat pad ('cause that's how I roll) and the dreaded STATOR CHANGE.

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post #6 of 6 (permalink) Old 09-29-2009, 04:41 PM
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You can pop off your right hand air cleaner and re-route the cables over the top off the air cleaner.
This is what i did and it keeps the cables from rubbing on the plug cap or wire.
However,youll have to pull your cables up by the headlight and and remove them from the the little wire thing that holds them in place up there or they may bind.
Works great.
Glad you figured it out tho.
Safe riding all.


--------------
1986 VN750
22.000 miles
Relocated R/R
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