Kawasaki Z750S weird electric problem - KawiForums - Kawasaki Motorcycle Forums
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  • 1 Post By sonny12511
  • 2 Post By ZZR600-2008
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post #1 of 8 (permalink) Old 05-29-2017, 11:18 AM Thread Starter
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Kawasaki Z750S weird electric problem

Hi everyone,

yesterday I experienced a weird problem with my 2005 Kawasaki Z750S. I was riding it all day and it was working with no problems until I stopped at a rest stop, and when I decided to leave, the bike just lost all electric power and couldnt start.
I turned the ignition on, pressed the kill switch on and the start switch and for a second everything seemed normal, then it just lost power. I turned the ignition off and on again , but no power at all.
I then disconnected the battery, and after a minute or so being confused, I connected the battery back and the bike fired up normally as nothing happened. I continued my ride and I did around 500km all together with no problems.

Has anyone here experienced similar problems ? Can it be a sign of a more serious problem ?
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post #2 of 8 (permalink) Old 05-29-2017, 12:54 PM
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Seems like the old Bill Gates Microsoft Windows repair- shut everything off and reboot to fix it.

You could search for a loose or dirty wire connection, or see if it happens again.

It is fairly common on older bikes for the wire from the battery to the ground on the frame to not be connected as well as it used to be.
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post #3 of 8 (permalink) Old 05-29-2017, 01:04 PM Thread Starter
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the bike was running great after reboot , like nothing happened, and it hasnt happened since
everything seems fine, no blown fuses, no loose wires, never experienced anything like it
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post #4 of 8 (permalink) Old 05-31-2017, 02:01 AM
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Sounds like it could be the master fuse which happened to me. In my case a 2013 Versys 650. Again, in my case the master fuse is located separately from the fuse box. You might want to download a manual for your bike or google the page, find out where it is.

But please note - if it is the master fuse then you will have to find out what caused it. I replaced mine only to have it blow out again 24 hrs later. Took the tank off to find that some of the wires up front had for whatever reason rubbed their insulation covering off etc..

good luck
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post #5 of 8 (permalink) Old 05-31-2017, 05:52 AM Thread Starter
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but if the master fuse was blown then the bike wouldnt start at all ?
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post #6 of 8 (permalink) Old 06-01-2017, 05:39 PM
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Quote:
Originally Posted by sonny12511 View Post
but if the master fuse was blown then the bike wouldnt start at all ?
Oops didn't read your post properly - definitely my bad!

Yes you're right.
Then I would check all connections to the master fuse, maybe there is a connection that is loose/worn whatever.
(as ZZR600-2008 pointed out)

The thing is all your electrics cut out at once so there's a very big possibility that it is related to the master fuse.
If it isn't that simple then at this point there's probably an electronic component that at issue and then I would take it into a Kawasaki specialist for a computer diagnosis.

Just because it started again doesn't mean it won't happen again. And it can be potentially dangerous if you're traveling at speed.

I nearly had a heart attack when mine happened - it was night on a crowded road and I was overtaking, and I admit at a goodly speed though not normally dangerous. Just as I pulled back into the lane everything cut out - lights, engine etc - and I just had enough wits about me to pull in the clutch and do a high speed coast to the road shoulder in the dark spot between two street lights. Glad the guy I passed was alert. Would have been the rear-end of the year!

Last edited by tropicalbikey; 06-01-2017 at 05:47 PM.
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post #7 of 8 (permalink) Old 06-04-2017, 11:23 AM
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Battery Terminal

If you haven't had any more problems, then it seems that your battery cable connections were probably oxidized (an insulator) and prevented the complete circuit. If you haven't disconnected the battery in years, this is not surprising. While I haven't had this happen on my cycles, I have had this happen several times on car battery connections, as well as home stereo. For cars, I then use a battery terminal cleaner brush/scraper on the post and terminals, tighten and coat with a protectant to prevent oxidation. On the stereo, one of two channels would stop working. Unplug all of the connections and replug and the channels all work again.

Just disconnecting and reconnecting will scratch through the oxidation layer enough to make connection again, it is best to disconnect and clean the connections with a little sandpaper, file, of scraping with a knife until a significant amount of clean metal surfaces can contact. Then tighten the connection. At a minimum,this should be done every few years - better every year if you are diligent with maintenance
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post #8 of 8 (permalink) Old 06-05-2017, 02:23 AM Thread Starter
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I haven't had any problems with the bike, runs great, just like it did before, everything works fine. Maybe the connections were oxidized and disconnecting and reconnecting fixed it, can't really know for sure, I checked the cables and they seem fine. The bike now runs fine and it hasn't happened again and I hope it won't happen again.
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