Reply To: Hyosung Aquila GV 125S running problem
Right, bare with me , as this is unique so let’s butt heads on this one shall we?
If your bike was a carb model (or EFi even) , commonly the sounds of the bike chugging, coughing, then dying right away points to usually:
- HT Caps (Heat is their enemy) and it is an outsourced cheap part, so we use NGK instead.
- Coils (it is not uncommon, but it does happen actually as the bike heats up)
EFi model only (your bike) ….extra parts for consideration/investigation
- TPS Sensor (Throttle position) , sounding like the bike was struggling to find an idle spot.
If you’re adamant to try replace the TPS, send us a picture of it (email us). We will order one for you (Not all Hyos use the same TPS sensor, Hyosung changes them) - Fuel Pump Wanning = But , i don’t think it’s the actual pump as the ECU would not start or let alone injectors dry run themselves.
It could be the “RELAYS” on the bike (Send us a picture and we may replace them for you) , other relays may be involved in the other places like injectors/lambda sensor - Lambda Sensor ? (on the exhaust pipe) – I doubt it, but if you’re not sure, you can carefully unscrew it and clean it , put it back in and see what happens.
If not, send us an email with a picture of the sensor (it has numbers written on it, code names and the plug) (Hyosung changes plugs)
Hell even the GV125 EFi has had more than 1 ECU change and more than 1 harness changes (so terminal plugs and sensors may change) - ET Sensor (Engine Temperature Sensor) – This was common on the bigger EFi GV bikes but i believed they fixed it on later updates….however…look for a sensor that is on the engine cylinder itself to read temperature , if it is not present on yours , it may just be reading temperature near radiator (water temp instead)
The old GV250 models have temp sensors on the front cylinder head (which was reading basically how hot the oil was getting as it was oil cooled with oil flowing around the cylinders anyway) – Just a thought! - Take a picture of your plugs and show us ? (Just to observe how dark the threads are and if the center of the plug is at the right colour or not)
Plugs can leave a small “trail” of hints as to what’s going on inside the cylinder. , we might even know which cylinder is cutting/dropping the most.
Update us fella. Sorry for delay. Had my own day in the workshop fixing a customer GV125 too! – It runs now thankfully but carb model.