Hyosung Aquila GV-125S Starter Switch problems
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Hi,
I’m having issues with the Starter switch on my Hyosung Aquila GV-125S Starter Switch problems, pressing the button seems to do nothing. When I turn the ignition on the bike goes through it’s checks and then reports Ready but pushing the button does nothing. This happened a few times and now it’s happening all of the time. I’ve tried pulling the clutch several times, putting the stand up and down and putting it in an out of gear but nothing works. The only way I can currently start the bike is to put it into first and push start it. Any ideas?
Thanks,
Nik
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Hi Nik,
Aside from having good battery and battery connections there’s three things this could be, the first and most likely would be a bad starter solenoid. this is a high current switch for the starter that is activated by the button on the handle bar. Usually you can tell if these are working properly if you get a little click from it when you press the button and there’s voltage on the wires that goes to the starter. One thing you can try is locate where your starter solenoid is, press the button to crank the bike over and give it a tap with something. if the bike starts cranking then it’s pretty likely the contacts in the solenoid are bad. if it does nothing at all, you can short the two high current wires on the top of it with a screwdriver briefly (12v in and 12v out to starter) to confirm that the starter is actually turning over. Some starters have solenoids built in but i would be surprised if that’s the case (though i can’t confirm).
The second thing to check is the starter itself, if the solenoid is supplying voltage to the starter but it’s not doing anything then you could have a bad starter. to get you by you can give the starter a little tap to see if it will start moving.
The third (and really unlikely thing) is that the starter button isn’t actually sending a signal to the solenoid. There’s also a possibility that you have a bad sensor that is stopping the bike cranking but that’s unlikely becuase you’d probably not be able to push start the bike either with that.
the best way to check this is to find the wire for the switch gear on that side, disconnect it and measure if the button connects the wires for the relay with a continuity meter. It’s very unlikely because the starter button is on the bottom of the switch gear and is shielded more from the weather than the buttons at the top, plus the S is much newer. stuff like this happens only really when things have been sitting.Hope that helps!
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Hi Darkvader,
many thanks for all of your input, not gonna lie, some of it’s going right over my head but one thing I can say is that there’s definitely no electrical click coming from the starter switch. Although I’ve not had a meter on the battery yet, it seems to have juice as there’s no dimming of the lights or instrument panel. I presume the starter solenoid would just be on the end end of the wire that’s connected to the starter switch?
Many Thanks again for your advice. I will post an update once I’ve had it checked out by somebody in the know.
Nik
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Not sure about the GV, but the GT(R) has a 10A fuse in the start-relay.
Old and grumpy,(?), have fairly wide engine & tuning experience, "restoring/resto-mod" on cars & mc, worked as electronic tech. (retired).
GT125R - sold. New (used): 2012-GT250R-efi (sold)+ 2017-GV-125C (sold) - got my old 2018-GT-125R back... 🙂
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Have you checked if all the connectors on the bike have water ingress lately?
Also , i could remove the stand switch, inspect the mechanism -> then use contact cleaner to clean the plugs. If the ECU can’t sense it , it won’t start.
Clutch Switch = Same here.
Neutral Switch (under the front sprocket) (don’t pull it out as there is a small spring inside connecting the drum, which is used to track positions , so be wise) and have a bucket as oil will pour our. Top up engine with fresh oil to avoid starving the gearbox. (if 100ml is drained there, then top up 100ml back in)
Ground connections = Black wires or any wires attached to the frame or battery negative.
Starter Switch = Check its PLUG under the fuel tank and open the Starter Switch just to make sure the kill switch contacts are OK. use contact cleaner (loads at halfords)
Starter RELAY Solenoid (Depending on your year GV125-S , it may have “Solenoid Starter + Its own fuse” or just “solenoid” by itself. ) = If these go out, your start button doesn’t work.
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