hard start - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
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post #1 of 24 (permalink) Old 09-29-2012, 06:16 PM Thread Starter
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hard start

vn 750 all stock, whenever we start bike it will start up right away, run it awhile and its hard to start up after you shut it off, checked carbs they appear to be on and no air leaks. any ideas?
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post #2 of 24 (permalink) Old 09-29-2012, 06:29 PM
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How old is the battery and what kind of shape is it in? A weak batt will cause starting issues. Clean the 2 main ground cable connections good, engine to batt box and battery to frame and of course both batt terminals.

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post #3 of 24 (permalink) Old 09-29-2012, 07:02 PM
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If you still have a regular wet cell battery we Strongly Reccomend replacing it with a maintenance free AGM battery. This alone has cured the majority of "hot start" problems and has the added advantage of not leaking battery acid over the R/R and junction box..

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post #4 of 24 (permalink) Old 09-29-2012, 07:05 PM Thread Starter
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battery is 5 months old but is a wet cell will check all grounds thanks
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post #5 of 24 (permalink) Old 09-29-2012, 07:21 PM
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I just replaced a wet cell made in 1999 last week with an agm. Huge difference in over all performanc

I only understand what I don't understand.
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post #6 of 24 (permalink) Old 09-30-2012, 09:50 PM
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Hot start

I am relitivly new to the form. Bought my 750 Vulcan about a month ago. I was unaware of the hot start problems that these bikes are known for (mine is a 1993). When I made a similar plea for help, I too got all of the same responses. 1. AMG battery. 2. Pick up coil mod. etc. The battery that was in my bike was brand new, however the previous owned put the cheapest Wal-mart battery he could get in the bike ($39.95 special). The fixes I read and heard about on this form didn't make sense to me. First, I checked out the MF battery that are around $80 for a cheap one but it didn't rate any higher in volts or CCA's thet the Wal-mart battery that I had tested. And while I will get a MF battery when I do have to replace it, I didn't think that was the "fix all". As far as the pick up coil mod, that made no sense to me at all. My experience in playing with "timing" is whatever you gain on the lower end, you pay for on the top end. Hat's off to the guy who posted that he solved his problem by adding an extra ground wire from the battery to the frame. I did that yesterday and it completely solved my starting problem! Wish I knew his name to give him props!
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post #7 of 24 (permalink) Old 09-30-2012, 10:54 PM
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I don't see how an extra ground from battery to frame would help.. if it did, then the original ground wire was bad.
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post #8 of 24 (permalink) Old 09-30-2012, 11:49 PM
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the pickup mod and battery replacement worked for me along with the ignition coil relay mod but to each there own and good luck with your bike Ivpreacher youwill get no help from others if you keep grumbling about there answers

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post #9 of 24 (permalink) Old 10-01-2012, 12:18 AM
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Quote:
Originally Posted by slimvulcanrider View Post
I don't see how an extra ground from battery to frame would help.. if it did, then the original ground wire was bad.
And there it is. Always amusing when someone questions stuff that has a long history of working.


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post #10 of 24 (permalink) Old 10-01-2012, 10:49 PM
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I'm asking, how does adding a second battery to frame ground help a hot start?

My knowledge of Electronics and electrical systems in both AC and DC currents tells me that adding a second ground would allow for more amps to be able to travel through the frame... But if you need to draw that many amps, then you have problems elsewhere like a starter that is drawing too many amps, a bad ground wire (as I posted) or any other number of problems.
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