GV125 Broken Down
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Hi,
My GV125 has stopped working, it is an electrical fault. Whilst riding today, the speedo and rev counter started flashing on and off. The spark plugs also must have failed as the bike started jolting on and off.
I did a quick roadside check with the minimal tools I had, and then deemed it royally screwed. It would not switch on again after stopping.
I have a couple ideas as to why this happened:
Dead battery – was running on the power created by the stator, slowly loosing power over time due to heat loss frictional loss etc.
Dead stator – stator failed to work and was not creating enough power to run the electronics, was using up the stored power in battery.
Blown fuse/dodgy electronics – I found out previously when working on these bikes, that if you unplug one piece of the electronics, the entire wiring harness fails and doesnt switch on anything.I hope somebody else has some suggestions, does anyone recommend SOS Motorcycle recovery? I am home, and the bike is stored at somebody I know who was local when the bike stopped working.
Thanks 🙁
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It could well be stator/rectifier fry up, the standard regs fitted to these bikes are complete s&*t, they burn up & if you don’t spot it they then take each phase out, they will keep going on 2 phases for a bit but once another goes its down to the battery only & it won’t last long. The stator is easy to check but I suspect if its got that far the wires will be melted at the connection’s.
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Thanks Simon, I did recently check the stator sidecase whilst doing an oil change, it looked okay, maybe I just didn’t know what I was looking for.
I’ll check that tomorrow or on Sunday when I can get my hands on the bike. I see the Hyoriders store has the stator for sale anyway, so hopefully this shouldn’t be a huge issue.
Thanks a lot, will get back asap with the results. Mechanically, the bike is sound with only 7000 miles so Im hoping I can get her back on the road. Thanks again
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Drain the oil, open the stator casing gently and take a picture to show us and put it back gently please as the stator gaskets on 125 twins definitely do not take kindly to being pulled!
When fitting the stator back in, use some wet oil to dress the stator gasket wet.
Don’t attempt to remove the gasket from the Casing! – Trust me.
Regulator = It must be changed one way or another with a new stator.
Its better the korean stators and regs take each other out, then use new parts as a new marriage (stator and reg as a new marriage always, lest the old stator attempts to take the new reg down)
——————————————————It’s been rainy and windy like crazy in UK lately, please investigate every inch of your bike harness.
_contact cleaner = Clean every plug with it.
_ACF50 spray can = Spray “a TINY” rain drop inside every single electric plug on the bike.
_Tape or Suzuki Harness Boot (Google this item for a pic, so you know. The go to any local breakers yard. Take harness boots from whatever brand bike they have. Hide your plugs subject to weather attacks.)Go to any bike garage or halfords = get a free battery test as they have special “analyzer” meters that will say on the LCD “change battery, battery cells weak, battery OK, etc…”
Consider a fresh Yuasa battery if its been a long while OR if the old charging system had anything with cooking it up.
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Check your coils – Test their resistance and check ground connections are good
HT Cap – It should still be tight and engine holes are totally covered to avoid water getting in to plugs ….If water gets in to the engine hole, it 100% causes the plugs to break down, and bike starts jolting or surging forward almost unstable , replace the plugs, its hard to save them once they behave like that. Look at the richness or lean colors of them or take pics and show us here..
Keep us updated.
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You can test the stator with a multimeter, the 3 yellow wires that come from the stator to a plug you need to touch the wires – pin1-pin2, pin1-pin3, pin2-pin3 you should if all well get a reading somewhere between. . 2ohm-.9ohm on all contacts anything out of that range it’s toast.
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Thanks for the instructions Marcel and Simon, update – I had to get the bike recovered and my only option was to get it recovered by a local garage. I had a few issues with specific recovery motorcycle companies who were trying to make things difficult for me.
So the bike is currently sat in a workshop, they’ve been closed for the past 2 days so they haven’t started any work on the bike yet. I have informed them on the current situation, and handed over your advice to them, in hope they check out the stator first.
I also recommended the Hyoriders shop website to them for spare parts for Hyosung bikes, as I don’t think they have a main dealer for major Hyosung spares, and Hyosung bikes/parts are very rare in my local area (South East).
Will post further updates, it is a shame that I couldn’t find a way to get the bike recovered back to my address, as I would have started work on it already. Hopefully I can get her back and running again.
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I also recommended the Hyoriders shop website to them for spare parts for Hyosung bikes, as I don’t think they have a main dealer for major Hyosung spares, and Hyosung bikes/parts are very rare in my local area (South East). Will post further updates, it is a shame that I couldn’t find a way to get the bike recovered back to my address, as I would have started work on it already. Hopefully I can get her back and running again.
Thank you sir. Hope they shop with us soon if we can be of any service to them!
And keep us posted on your situation 🙂
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Update – got the bike back now, after an afternoon of cleaning, polishing and waxing. The mechanics left it outside for a bit, upsetting 🙁
It was actually a dodgy hazard relay that blew a fuse on the bike. The stator is still working… but I’ll probably end up replacing it soon anyway. Plus it does need a new battery too.
Over two weeks for a dealership to find a new relay… and they probably ended up buying some generic one from ebay anyway. Pretty sad with that, but they were quick and speedy to recover the bike. Didn’t cost me too much, 75% of the cost was the recovery. Just the time it took was painful.
Well, at least I know how to change the stator.
To be honest, my GV125 needs a complete overhaul. Its done 7800 miles and hasn’t had a major service since 1500 miles, only regular oil changes and chain maintenance done by myself.
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