hard start, stuttering, stalling - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 19 (permalink) Old 07-18-2012, 12:01 PM Thread Starter
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hard start, stuttering, stalling

I have a 1993 vn750 that I haven't had for too long. I've ridden it only three times before I have had problems. I changed the spark plugs not too long after I got it and seem to be having the problem since then but may be a coincidence. It is difficult to start and I need to give it gas to keep it running but then it just constant pop pop sound and wants to stall. I don't have any experience with engines so talk to me like I'm five if you have an idea what is going on. I am good with mechanical things if I have direction. thank you

1993 Vulcan VN750
2006 Honda Rebel
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post #2 of 19 (permalink) Old 07-18-2012, 12:20 PM
Crap, I WAS in 5th gear.
 
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Let's start simple. Please forgive this question, but did you remove the nibs on the spark plug ends so that it has bare threads?
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post #3 of 19 (permalink) Old 07-18-2012, 12:27 PM
..have a vulcan good day!
 
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Quote:
Originally Posted by Kelly2001 View Post
Let's start simple. Please forgive this question, but did you remove the nibs on the spark plug ends so that it has bare threads?
x2

Also, ensure Spark plug wires have a solid connection ON BOTH ENDS.
What plugs are your new ones?
Are they gaped properly (gap would need to be WAY-OFF for these symptoms).
Have you observed (@ night) your Spark Plug wires for arcing ?

hope this helps
WilliamTech

'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
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post #4 of 19 (permalink) Old 07-18-2012, 12:27 PM Thread Starter
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the threads are bare. One of the plug holes was stripped so I had to keep taking the new plug in and out to kind of rethread the hole. Does this sound more like a spark plug issue than carb? I know I need new boots and wires, right now they are electrical taped in various places.

1993 Vulcan VN750
2006 Honda Rebel
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post #5 of 19 (permalink) Old 07-18-2012, 12:29 PM Thread Starter
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Quote:
Originally Posted by WilliamTech View Post
x2

Also, ensure Spark plug wires have a solid connection ON BOTH ENDS.
What plugs are your new ones?
Are they gaped properly (gap would need to be WAY-OFF for these symptoms).
Have you observed (@ night) your Spark Plug wires for arcing ?

hope this helps
WilliamTech
ok. this is sounding like I need to replace those wires.

1993 Vulcan VN750
2006 Honda Rebel
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post #6 of 19 (permalink) Old 07-18-2012, 12:34 PM Thread Starter
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one of the wires came apart right above the boot but I was able to slide it back together and put tape around it.

1993 Vulcan VN750
2006 Honda Rebel
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post #7 of 19 (permalink) Old 07-18-2012, 12:42 PM
..have a vulcan good day!
 
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Quote:
Originally Posted by warmheartedrebel View Post
ok. this is sounding like I need to replace those wires.
...not necessarily .

...but, info shouldyou decide to:

Are those resistor caps? Yes ! The Kaw's have replaceable resistors. You should consider buying NGK plug ends if you haven't already. They are great looking and my directions are based on using them. Dennis Kirk: 1-800-328-9280
You can get the NGK caps from Dennis Kirk or most independent bike shops.
Plug Wires: Dennis Kirk has 7mm wire for $2.99 in a 72" length the part # is 20- 21. Ad two NGK end caps part #20-306 $3.30 and two end caps part #20-789 $2.40 each.
I used standard 7mm. Caps I used were the NGK XD05F, long cover and LD05F, short cover.

WilliamTech

'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
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post #8 of 19 (permalink) Old 07-18-2012, 12:46 PM Thread Starter
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Quote:
Originally Posted by WilliamTech View Post
...not necessarily .

...but, info shouldyou decide to:

Are those resistor caps? Yes ! The Kaw's have replaceable resistors. You should consider buying NGK plug ends if you haven't already. They are great looking and my directions are based on using them. Dennis Kirk: 1-800-328-9280
You can get the NGK caps from Dennis Kirk or most independent bike shops.
Plug Wires: Dennis Kirk has 7mm wire for $2.99 in a 72" length the part # is 20- 21. Ad two NGK end caps part #20-306 $3.30 and two end caps part #20-789 $2.40 each.
I used standard 7mm. Caps I used were the NGK XD05F, long cover and LD05F, short cover.

WilliamTech
Ok. thank you very much for this information. I'll replace these and then go from there. They probably should be replaced if im using tape on them lol. Thank you for your time...I may be back.

1993 Vulcan VN750
2006 Honda Rebel
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post #9 of 19 (permalink) Old 07-18-2012, 02:45 PM
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I'm not trying to hijack this thread, but do our bikes have to have the resistor in the caps?
I plan on getting a set of automotive wires with plain ol ends and putting them on my bike.
Would they affect the CDI box?
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post #10 of 19 (permalink) Old 07-18-2012, 06:11 PM Thread Starter
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Quote:
Originally Posted by WilliamTech View Post
...not necessarily .

...but, info shouldyou decide to:

Are those resistor caps? Yes ! The Kaw's have replaceable resistors. You should consider buying NGK plug ends if you haven't already. They are great looking and my directions are based on using them. Dennis Kirk: 1-800-328-9280
You can get the NGK caps from Dennis Kirk or most independent bike shops.
Plug Wires: Dennis Kirk has 7mm wire for $2.99 in a 72" length the part # is 20- 21. Ad two NGK end caps part #20-306 $3.30 and two end caps part #20-789 $2.40 each.
I used standard 7mm. Caps I used were the NGK XD05F, long cover and LD05F, short cover.

WilliamTech
I just ordered those parts. Where are your directions that you mention?

1993 Vulcan VN750
2006 Honda Rebel
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