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Discussion Starter · #1 ·
Cheers..

I have a weird and potentially dangerous issue going on with my bike (2000 ZX12R). I was out riding and my bike shut it self off two times for no apparent reason. It just died.
First time it happened, I was riding along on a straight stretch of road (not speeding or anything..). Coasted to a buss stop, pulled over, thinking -WTF?? Turned the key off and turned the key back on, and the bike got its electric power back as if nothing had happened. Second time it happened, (now riding at a "loose your licence" speed), as I was giving it throttle out of the corner, the bike died again. Coasted to a stop, tuned the key off and back on, and again the bike started and ran as if nothing had happened.

This issue is creepy and possibly dangerous.. First thing that came to mind was a faulty tip over sensor, but if that was the case, the bike should have turned off when ever I leaned it over. My second guess is a worn out ignition key switch. Sometimes I have to give the key a little wiggle to turn the bike on.. Other than that, no idea..

Any one else had this sort of issue, or an idea what is going on? The first time it happened I was just like WTF? but after the second time, that freaked me out a little because loosing all electric power while hanging off the bike, leaning it through a corner and starting to give it throttle out of the corner is not the best feeling...

Thanks!
/Tom
 

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From what you've written I'd first be looking at the ignition switch. I would think it's possible for vibrations while riding causing the ignition to cut out.
I have had a similar occurrence on my 12 where twice it cut out while riding, but will have to check my own service notes as to what the outcome was (forgot!).
 

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A total power failure could be a few things, an ignition switch or plug related, or loose battery terminals, or bad connections in the starter solenoid where the main 30 amp green system fuse is.
 
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Discussion Starter · #4 ·
Thanks Gentlemen..

I will investigate and let you know what I find. At the moment I suspect the ignition switch is the culprit, but will check out everything mentioned.

Thanks!!!
/Tom
 

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Does the instrument cluster clock reset, as if it does it's more likely to point to a battery tray located problem?
 

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I had similar symptoms a couple of weeks before my stator died (at least, looks like my stator has died - there is a parallel thread on this active at the moment).

The first time it did it I was at medium revs, but more recently it does it consistently at low revs (which is very much inline with dead stator).

Short summary - one of your possibilities could be that these cut-off symptoms are maybe early signs that your voltage is low cos of stator, battery or reg......
 

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Discussion Starter · #7 ·
Cheers Stube40

I have replaced the stator and rectifier in mid July. I have checked the charge voltage and wireing several times after that, and all is good. But will check it again..
I think the most likelly issue is the ignition switch. It has been giving me trouble from time to time since I bought the bike, but during this riding season, it has become worse.. Any way, I have not had the time to really investigate what the issue is, so I´ll report back later on what I find...

Thanks..
/Tom
 

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It does sound ignition switch-related now, easy enough to check, but it could be a bad loom wire.
As for the switch, I stripped a zx-9r one down which is similar, and did a write-up on testing and checking with pictures here at zx-9r.net.
 

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That does happen because the admin bans groups of IP addresses to cut down on the spam, you may have fallen into one of those collectives, if you click on the contact admin he will be able to unban you, there is no malice intended, it does happen frequently, but is easily rectified.
It happened to me too, sometimes just disconnecting your router from the internet for a minute or two results in getting a different IP address and your back in, or using your mobile phone data rather than your home wifi.
It's worth registering as there are a few similarities between the zx-9r and zx-12r where they use the same components, and I've probably done a picture guide on how to check and test or fix them.
 

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Discussion Starter · #12 ·
Thought I would write a short update... I have not had any real time to investigate the issue other than...

I could not recreate the issue with "wiggling" the ignition key.
Also I did not mention/answer Ninjayorkies* question about the instrument cluster clock - No, the clock did not reset itself when the bike suddenly shut itself off.

I will report back again once I have more time trying to figure out what the issue/cause is...

/Tom
 

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If the clock resets it's a main power supply problem unless it's off for only a very short time.
Most probably a power supply to the ECU problem.
I did some testing on the vehicle down sensor and put my finding up here in my "Yorkies zx-12r thread". https://www.zx-9r.net/viewtopic.php?f=56&t=21160 you will have to scroll down a bit but may find it useful.
 
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