20 Most Recent 2001 Hyosung GV 125 Aquila Questions & Answers

Have you any compression? If not, pour a few ounces of motoroil in the spark plug hole to place some oil on top of the piston and let it soak for a day or so. Fit an old spark plug and check compression. It should be good now. Turn the engine over a few times to blow the excess oil out and fit a new plug. After checking the petrol and oils is mixing OK and the carb is "wet", try starting again.

Make sure the gear box has fresh oil and any hydraulics have fresh fluid.
Hope you get it going.

exhausts are a dark art.......to gain maximum power ..they will need to be of a tuned length...and of certain diameter at certain points.... if your having them made by a reputible(sp) companythey should be abe to get you in the right ball park... take into consideration groung clearance etc,

Go to www.repairmanuals.com

I am a Harley guy, but your bike might have a BAC sensor, it is made to shut the fuel off if you tip the bike. Simple test, is to get to the air breather, crack the throttle, use a spray bottle spray so gas in the breather inlet. Then try to start it, if if starts and runs just a bit and dies, it means you are not getting fuel and the is a sensor somewhere.
I've been told that if you disconnect the battery for 30 min. then reconnect, it coould reset it.
I hope this at least gives you a direction.
Paul

hi,i dont know why you would have to drain a battery but however,you have effectively flattened it by draining the electrolite out,DO NOT TRY AND CHARGE IT,IT WILL EXPLODE, the only thing you can do now is take the battery to an auto electrician have it refilled and recharged(if it still usable)if it is not still usable then you will be in for a new one,hope this helps

Try unhooking the battery while it is running,if it dies,then the charging system is defective,if it stays running,the connections on the battery or the battery itself is defective

Question edited for clarity. Help and the Service Manual https://www.google.com/search?q=2002+hyosung+sense+gas+and+vacuum+line+diagram ..

Question edited for clarity, typos, add CAPS. Did the take the connectors away? Otherwise, use bullet crimp connectors and shrink wrap sleeve same colour to same colour. https://www.google.com/search?q=2011+hyosung+gv250+efi+wiring+diagram ..

https://www.google.com/search?q=2008+Hyosung+GV+250.+It+is+bogging+down+on+acceleration ..

Check the actual switch on the handle bar. These can sometimes fail and stick in the on or off position. This could also be a faulty solenoid between the battery and the starter motor. Try this. Find the Solenoid. It's usually a small, black, round barrel shaped block. It will have two small and two large cables attached to the top of it. Disconnect one of the Small wires and reconnect the battery. If it kicks over it is most likely the solenoid. Disconnect the battery. Refit the Small wire then reconnect the battery. If the engine kicks over it could be the actual starter button.

Question edited for clarity and toss in some CAPS. Charge the battery up whilst it is still in the bike. If the voltage is lower than 11 volts or so with the engine being drained by the starter, there is not enough power to operate the fuel injection. The battery needs to be 12.4 to 13.2 volts. https://www.google.com/search?q=2018+Hyosung+GT125R+crank+won%27t+start ..

That was not the drain plug you pulled. Here is where i learned alot about my bike great source for information. And dyi guides. Idk when this was posted but you want to go here before you get into alot more of a project. https://hyoriders.club/forums/topic/wrong-drain-plug-for-oil-change/

There could be several possible causes for your 2002 Hyosung GV250 bogging down when starting out. Here are a few things to check:

1. Fuel system: Ensure that the fuel system is functioning properly. Check for clogged fuel lines, dirty fuel filter, or inadequate fuel supply.
2. Carburetor: The carburetor may be dirty or clogged, causing a lean fuel mixture. Clean the carburetor or have it professionally cleaned if needed.
3. Air filter: A dirty or clogged air filter can restrict airflow to the engine, leading to poor performance. Check and clean or replace the air filter as necessary.
4. Spark plugs: Worn or fouled spark plugs can cause poor ignition, resulting in engine bogging. Check and replace the spark plugs if necessary.
5. Exhaust system: A partially blocked or restrictive exhaust system can cause poor performance. Check for any obstructions and clear them if necessary.
6. Electrical system: Ensure that the battery and charging system are functioning properly. Weak battery or faulty charging system can lead to inconsistent power delivery.

If these steps do not resolve the issue, it may be necessary to have a professional mechanic inspect the motorcycle to diagnose the exact cause of the problem.

No one has experienced your issue although there are some electrical issues in the link. Check the all the connectors around the cluster. Break the connections, spray with switch cleaner and remake the connections. https://www.google.com/search?q=2013+Hyosung+GT250R+cluster+not+working ..

i know this may seem drastic but in my experience i have found that the Chinese electric connectors are normally at fault first thing i would do is chop the connection block out and either put your own bullet connectors in or solder the wires together either way it is the connector at fault and needs replacing

The fuel gauge is faulty and should have to be replaced.

It sounds like there may be an electrical issue with your motorcycle. Here are a few things you can try:

1. Check the battery connections - Make sure the battery cables are securely attached to the battery terminals and that the connections are clean and free from corrosion.
2. Test the battery - Use a multimeter to test the battery voltage. A fully charged battery should read around 12.6 volts. If the battery voltage is low, try charging the battery or replacing it.
3. Check the fuses - Check all the fuses in the fuse box, including the main fuse. If any of the fuses are blown, replace them.
4. Check the wiring - Inspect the wiring for any damage, loose connections, or corrosion. If you find any issues, repair or replace the affected wiring.

If none of these steps help, you may need to take your motorcycle to a professional mechanic or dealership for further diagnosis and repair.

The Service Manual is in the link, plus other help. https://www.google.com/search?q=check+timing+on+Hyosung ..

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