Hyosung Motorcycles - Recent Questions, Troubleshooting & Support


Hi, Ann for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Hyosung, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.youtube.com/watch?v=tzmJYuzndAE
https://www.youtube.com/watch?v=Cofjt1tAbOI
Hyosung Aquila 250 Service Manual
https://alpha-sports.com/hyosung_parts.htm
HYOSUNG GV250 User Manual

2003 Hyosung GV... | Answered on Jul 13, 2019


Hi, Luke for more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://motorcyclistlifestyle.com/hotwire-a-motorcycle
How to hotwire motorcycle
HYOSUNG GT 250 Service Manual
https://www.hyosungwholesale.com/pages/catalog
HYOSUNG GT250 FI Owner Manual

2012 Hyosung GT... | Answered on Jul 06, 2019


Hi, Anonymous and the usual suspects are:
1. Severely discharged or a damaged battery should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a cursory reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead-acid batteries.
2. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
3. Spark plugs in bad condition or partially fouled.
4. Spark plug cables in bad condition and leaking check for spark leakage in the dark
5. Spark plug gap too close or too wide.
6. Faulty ignition coil, module, and or sensor.
7. Loose, dirty, or corroded ignition module connector at crankcase.
8. Faulty CKP or CMP, MAP, ETS, ATS, TPS, O2 sensor.
9. Dirty air filter.
10. Intake air leak.
11. Water, dirt, or rust in the fuel system.
12. Carburetor contaminated, sticky float, plugged jets.
13. Carburetor has oil in the bowl due to excessive oil in pre-mix.
14. Carburetor vacuum diaphragm torn, cracked, not seated or installed improperly.
15. Multiple carburetors out of sync.
16. Fuel filter clogged.
17. Old or contaminated fuel.
18. Fuel tank vent system plugged or carb vent line closed off.
19. Gas cap diaphragm valve faulty.
20. Vacuum line from the intake manifold to fuel valve is broken, cracked, pinched, or missing.
21. Carburetor controls misadjusted.
22. Incorrect valve timing.
23. Valve springs floating, weak, or broken.
24. Damaged intake or exhaust valve.
25. Incompatible performance parts.
26. The control module may be in "LIMP" mode
27. Check for engine trouble codes.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.google.com/search?sa=X&q=Misfires+2005+Hyosung+GV250+Aquila&tbm=isch&source=univ&ved=2ahUKEwj04M3O9fziAhUDtlkKHSFBCggQsAR6BAgAEAE&biw=1440&bih=757
https://www.reddit.com/r/Fixxit/comments/15hkg1/hyosung_gv250_aquila_misfiring_and_dies_when
https://netrider.net.au/threads/2010-hyosung-gt650-misfire-and-stalling-when-hot.111646
Hyosung Aquila 250 Service Manual
https://alpha-sports.com/hyosung_parts.htm
HYOSUNG GV250 User Manual

2005 Hyosung GV... | Answered on Jun 22, 2019


Hi, Anonymous the vast majority of service, parts fiche, and owners manuals on the internet are "FREE" to download and all service manuals contain wiring diagrams in the back pages. The rest usually charge a modest fee of $15 and there is a handful of obscure, rare, obsolete, and very old models that are no longer or never were available and some were never printed in English. The Indian and Philippine markets are usually in E-book format only, for these rare occasions I shall look on eBay and find the cheapest one available. Most of the manuals will cover your exact make, model, and year otherwise one will be provided that comes as close as possible to your bike and will have most of the same info that an exact manual would have. If there is no $ sign after the manual link it is free to download.
To download your manual for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Hyosung Sense SD 50 Service Manual
https://alpha-sports.com/hyosung_parts.htm
http://mybikemanuals.com/hyosung
http://www.motorcycle.com/specs/hyosung/scooter/2007/sense/sd50.html
https://en.wikipedia.org/wiki/Hyosung

2007 Hyosung... | Answered on Jun 22, 2019


Hi, Beno8035 if your bike has been sitting idle for months or years and you did not do any pre-storage maintenance I feel your pain it will probably have a dead battery and not want to start or if it starts it will not idle unless the choke is full on and run poorly then stall, here are the following steps necessary to complete in order to get your bike back to an acceptable running condition and in the future pour in a bottle of fuel stabilizer and injector cleaner for you FI folks at least 2 times a year and before storage.
1. If your battery was 2-3 years old when you last had the bike running you should replace it.
2. If you believe your battery might still be serviceable remove it from the bike and put it on a 1 or 2 amp trickle charger for 24 hours. If it is the old lead acid type with visible cells and acid levels fill each cell to the top line with distilled water and replace the caps, run the vent tube into a plastic or styrofoam cup, any cells that are cloudy/milky replace the battery.
3. After charging the battery remove the leads and let it sit for a couple of hours then check the battery voltage with a voltmeter, you should have 12.5 volts or more, any readings in the 11 volt range you need to do a proper "LOAD" test on the battery and replace as necessary, you may have 12.5 volts or better but little or zero amps, any readings in the 10 volt range you have a dead cell and the battery needs to be replaced.
4. Drain and flush fuel tank if it rusty there is a cheap and easy fix. https://www.youtube.com/watch?v=fUYr_7SwGms
5. Remove and inspect your air cleaner paper elements that are not oil soaked can be cleaned with a soft brush and low pressure compressed air, oil-soaked elements must be replaced. Gause mesh and foam elements can be cleaned by soaking them in a container big enough to completely cover them with a solution of 1 gallon of water and 1 oz. of Dawn dishwashing liquid for small and medium size elements, for monster size double the formula and let soak for at least one hour then rinse with warm water shake off excess and let air dry, "WARNING" do not use compressed air as this will embed micro-sized dirt and road grime and destroy the mesh pattern and stretch foam elements out of shape just squeeze it like a sponge and let air dry, use a fan if you're in a hurry. When completely dry spray a very fine mist of air filter oil evenly around the whole element.
6. Remove the carburetors, disassemble and decontaminate with a "CARB DIP" or if you have EFI remove injectors and clean with carb spray and compressed air
7. Check intake manifold and seals for leaks and craks.
8. Remove fuel valve and filter disassemble and clean as necessary, remove, clean, and inspect fuel and vacuum lines and replace as necessary.
9. Replace spark plugs with new ones and check for spark.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.motorcycleforum.com/59-motorcycle-repair/216690-2008-hyosung-gt650r-wont-stay-running.html
http://korider.com/index.php?topic=24357.0
HYOSUNG GT 650 Service Manual
https://alpha-sports.com/hyosung_parts.htm
https://www.manualslib.com/manual/810064/Hyosung-Gt650.html#product-GT650%20R%20Ei

2008 Hyosung... | Answered on Jun 22, 2019


Hi, Anonymous for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Hyosung, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.google.com/search?q=Rear+wheel+removal+2006+Hyosung+Karion+125&tbm=isch&source=univ&sa=X&ved=2ahUKEwjznsj26_ziAhUEuVkKHTw-DrQQsAR6BAgAEAE&biw=1440&bih=757
How to Remove and Replace your Rear Motorcycle Wheel Part 1
HYOSUNG RT 125 Service Manual
https://alpha-sports.com/hyosung_parts.htm
https://www.manualslib.com/manual/797228/Hyosung-Karion.html

2006 Hyosung... | Answered on Jun 22, 2019


Hi, Colin derestrict is a negative term rider's use to express their wish to improve performance on their bike or scooter. Depending on the country and motor vehicles laws some bikes and scooters are designed to conform with said laws and their performance is slightly lower than other countries. All vehicles in the world are designed to perform at 75-80% of their maximum potential, this ensures the longevity of the engine. Derestricting or improving performance is always possible on any vehicle but the tradeoff of engine longevity numbers go down, how much depends on the number and type of performance upgrades. Your local dealership or reputable independent shop are best equipped to provide you with technical data and willingness to comply with your needs.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
http://korider.com/index.php?topic=5102.0
https://www.bikechatforums.com/viewtopic.php?t=127108
HYOSUNG COMET 125 Service Manual
https://alpha-sports.com/hyosung_parts.htm
HYOSUNG GT 125 Manual

2006 Hyosung GT... | Answered on Jun 22, 2019


Hi, Anonymous for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Hyosung, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.kiwibiker.co.nz/forums/showthread.php/149825-Hyosung-GT250r-tacho-not-working
http://korider.com/index.php?topic=13519.0
https://www.manualslib.com/manual/1293927/Hyosung-Aquila-Gt250-Ej.html#product-Aquila%20GT250%20R%20Ej
https://alpha-sports.com/hyosung_parts.htm
HYOSUNG GT250 FI Owner Manual

2008 Hyosung... | Answered on Jun 22, 2019


Hi, Anonymous for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Hyosung, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.google.com/search?q=Fuse+box+location+2007+Hyosung+GV250&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjv5oaD5_ziAhUBuVkKHYsODmMQ_AUIEigD&biw=1440&bih=757
https://www.manualslib.com/manual/406871/Hyosung-Gv-650-Efi.html?page=67
Hyosung Aquila 250 Service Manual
https://alpha-sports.com/hyosung_parts.htm
HYOSUNG GV250 User Manual

2009 Hyosung GV... | Answered on Jun 22, 2019


Hi, Tennis_rules and the usual suspects are:
1. Fuel tank empty.
2. The fuel tank has old dead gas.
3. Fuel tank bottom contaminated with ethanol sludge, dirt, water, rust, etc.
4. Fuel supply valve/petcock turned off.
5. Fouled spark plugs.
6. Engine flooded as a result of overuse of the choke.
7. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
8. Fuel valve/petcock or filter clogged.
9. Fuel line to carburetor or throttle body pinched, kinked or blocked.
10. Carburetor float stuck.
11. Fuel injectors clogged.
12. Fuel injectors stuck open.
13. Quick disconnect check ball stuck.
14. Compression below 75 PSI.
15. A stuck-bent-burnt valve.
16. Improper valve clearance (too tight)
17. Severely discharged or a damaged battery should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a cursory reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead-acid batteries.
18. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
19. Loose or corroded wire connection at the coil or plug between ignition sensor and ECM module.
20. Spark plug cables in bad condition and shorting check for spark leakage in the dark, cable connections are loose or connected to the wrong cylinders.
21. Ignition timing incorrect due to a faulty ignition coil, ignition module or MAP, CMP, CKP, O2, TPS, ETP, IAC sensors.
22. Faulty neutral, clutch, kickstand safety switch.
23. Faulty fuel pump or fuse or relay.
24. Faulty or corroded run/stop switch.
25. Tilt sensor needs a reset.
26. Security system not disarming alarm needs a reset.
27. Check for engine trouble codes.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.reddit.com/r/motorcycles/comments/2al7dq/bike_wont_start_normally_screwdriver_solenoid
What To Do If Your Motorcycle Doesn Start
https://www.manualslib.com/manual/1189833/Hyosung-Rt-125-D.html#product-XRX%20125%20SM
https://alpha-sports.com/hyosung_parts.htm
http://mybikemanuals.com/hyosung

2008 Hyosung XRX... | Answered on Jun 22, 2019


Hi, Heidiyoung26 before testing any electrical component in the Starting Circuit it is "IMPERATIVE" that you have a fully charged battery of 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage, the battery is faulty and must be replaced. AGM type batteries fall into this scenario more so than lead-acid batteries.
1. Ignition Switch not in the "ON" position.
2. Engine Run Switch in the "OFF" position.
3. Engine Run Switch is "FAULTY" or corroded.
4. Check the battery terminals for damage or corrosion check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter.
5. Bank angle sensor needs a reset or is faulty.
6. FOB battery low or dead.
7. Faulty ignition switch.
8. Faulty starter button.
9. Faulty kickstand, clutch, neutral safety switch.
10. Security alarm needs a reset.
11. Starter relay, solenoid, starter motor or circuit wiring faulty.
12. Starter armature or field coils have failed.
13. Main fuse or circuit breaker may be blown or faulty.
14. Faulty ignition relay.
15. The electric starter is working but starter clutch has failed.
16. Check for engine trouble codes.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
What To Do If Your Motorcycle Doesn Start
3 Things to Look for When Your Motorcycle Won Start The Allstate Blog
http://www.banici.pl/bam/Tom/GV125/Instrukcje/GV125_SERVICE_MANUAL_EN.pdf
https://alpha-sports.com/hyosung_parts.htm
http://www.family-motorsports.net/GY6-50cc-150cc.pdf
https://absolutelyscooters.net/pdf/CGEN_dawg_scooter_manual.pdf

Hyosung... | Answered on Jun 22, 2019


Hi, Anonymous for more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.youtube.com/watch?v=8wiLY2wYKiY
How to Remove and Replace an Ignition Lock Cylinder
Hyosung Aquila 250 Service Manual
https://alpha-sports.com/hyosung_parts.htm
HYOSUNG GV250 User Manual

2005 Hyosung GV... | Answered on Jun 22, 2019


Hi, Shadow200695 it should be noted that the reasons your FI light stays on constantly or flashes and your bike will or will not start and may turn over or may not and run great or sputter, these conditions will vary from bike to bike depending on the year, make, and model and you should always refer to your owners/service manual for proper diagnostic procedures. It should also be noted that any type of prior work done to the bike or an abnormal event occurrence IE: adding accessories, electrical curiosity/adventures, laying the bike down/crashes, rain storms/bike washings just before FI light issues started can be significant hints/aids into tracking down the gremlin, also carry the appropriate jumper wire to access fault codes to reduce the risk of being stranded or towed. The newer the bike the more sensitive the ECM becomes and will not let the bike start when aftermarket accessories have been installed without being reprogrammed. That being said the usual suspects are:
1. Faulty Fuel Pump, fuse or system relay switch.
2. Battery starting to fail due to old age/damage, perform a load test.
3. A discharged battery, check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Faulty safety switches/sensors: run/off, ignition, clutch lever, neutral, side stand, tip over, fuel, and or their connections.
5. Broken wire or worn insulation exposing wire to a ground situation especially inside wire harness at tight bends around fairing brackets, under dash panels, under fuel tanks over cylinder heads, etc. Many harnesses are open on the ends that will allow water to enter and accumulate at v-bends.
Dielectric grease and contact cleaner are your best friends for wire/cable/harness connectors, look for corroded, broken, or loose pins/sockets.
6. Installation of aftermarket accessories ie. exhaust systems, mufflers, air cleaners, fuel tuners, electrical component, etc.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://forum.perthstreetbikes.com/forum/motorcycle-topics/two-fiddy-lams/137848-hyosung-fuel-injection-light-problem?t=135279
https://netrider.net.au/threads/hyosung-fault-code-fi-light-wont-clear.233417
https://www.motorcycle-manual.com/hyosung-fault-codes
Hyosung Aquila 250 Service Manual
https://alpha-sports.com/hyosung_parts.htm
HYOSUNG GV250 User Manual

2015 Hyosung GV... | Answered on Jun 22, 2019


Hi, Nwhyte for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Hyosung, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.manualslib.com/manual/406860/Hyosung-Gt-650-Efi.html?page=64
https://www.youtube.com/watch?v=0wr3Sg8gHVY
HYOSUNG GT 650 Service Manual
https://alpha-sports.com/hyosung_parts.htm
https://www.manualslib.com/manual/810064/Hyosung-Gt650.html#product-GT650%20R%20Ei

2007 Hyosung... | Answered on Jun 22, 2019


Hi, Anonymous for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Hyosung, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.ebay.com/b/For-Hyosung-Motorcycle-Instruments-and-Gauges/180033/bn_51046848
https://www.youtube.com/watch?v=9n--x0RIXsM
Hyosung Aquila 250 Service Manual
https://alpha-sports.com/hyosung_parts.htm
HYOSUNG GV250 User Manual

2003 Hyosung GV... | Answered on Jun 22, 2019


Hi, Anonymous derestrict is a negative term rider's use to express their wish to improve performance on their bike or scooter. Depending on the country and motor vehicles laws some bikes and scooters are designed to conform with said laws and their performance is slightly lower than other countries. All vehicles in the world are designed to perform at 75-80% of their maximum potential, this ensures the longevity of the engine. Derestricting or improving performance is always possible on any vehicle but the tradeoff of engine longevity numbers go down, how much depends on the number and type of performance upgrades. Your local dealership or reputable independent shop are best equipped to provide you with technical data and willingness to comply with your needs.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
http://scootdawg.proboards.com/thread/36282/hyosung-sf-rally-more-60km
https://www.kiwibiker.co.nz/forums/showthread.php/26569-Derestricting-a-Hyosung
https://www.scribd.com/doc/18981654/hyosung-SF50
https://alpha-sports.com/hyosung_parts.htm
HYOSUNG SF 50 Manual

2006 Hyosung SF... | Answered on Jun 22, 2019


Hi, Anonymous and the usual suspects are:
1. Improper clutch adjustment or not disengaging.
2. Bent shift shaft.
3. Shift fork bent or seized.
4. Gear seized on the shaft.
5. Gear positioning lever binding.
6. Shift return springs weak or broken.
7. Shift return spring pin loose
8. Shift mechanism arm spring is broken.
9. Shift mechanism arm is broken.
10. Shift drum is broken.
11. Shift lever loose on the shift shaft.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.kiwibiker.co.nz/forums/showthread.php/105096-Hyosung-gt250-not-shifting
https://www.motorcycleforum.com/59-motorcycle-repair/179186-gear-shifting-problems.html
HYOSUNG GT 650 Service Manual
https://alpha-sports.com/hyosung_parts.htm
https://www.manualslib.com/manual/810064/Hyosung-Gt650.html#product-GT650%20R%20Ei

2008 Hyosung... | Answered on Jun 22, 2019


Hi, Anonymous for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Hyosung, despair not, for a mere zero $0 you can download another one.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://motofaction.org/motorcycles/hyosung-gt250-gt250r-gt250v-comet-125-250/how-to-change-engine-oil-and-filter-gt250-gv250-comet-gt250r
https://www.youtube.com/watch?v=cCQL_nToHm4
https://www.manualslib.com/brand/hyosung
https://alpha-sports.com/hyosung_parts.htm
http://mybikemanuals.com/hyosung

Hyosung... | Answered on Jun 22, 2019


Hi, Anonymous for more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.youtube.com/playlist?list=PL5ertYe-vAxtzGbbBCC3yjmStZWU2HWVU
https://www.youtube.com/watch?v=p0Z1xcjTEAA Hyosung Aquila 250 Service Manual
https://alpha-sports.com/hyosung_parts.htm
HYOSUNG GV250 User Manual

2005 Hyosung GV... | Answered on Jun 22, 2019

Not finding what you are looking for?
Hyosung Logo

985 questions posted

Ask a Question

Usually answered in minutes!

Popular Products

Top Hyosung Experts

Arnie Burke
Arnie Burke

Level 3 Expert

5924 Answers

Marvin
Marvin

Level 3 Expert

85160 Answers

richard libby

Level 2 Expert

209 Answers

Are you a Hyosung Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...