Hyosung Motorcycle Key Replacement

Hyosung key quick facts

Hyosung GT650 and GT250R motorcycles come from the factory with two ignition keys.
Hyosung ignition keys are stamped with an identifying number that is used to make replacements.
The GT650 rear seat lock is opened with the ignition key.
On the GV250 the ignition key also opens the seat lock and the fuel tank cap.
Hyosung's motorcycle business became S&T Motors in 2007 and KR Motors in 2014.

Hyosung is the Korean maker behind the GT250 and GT650 sport bikes and the GV250 and GV650 Aquila cruisers. The motorcycle business was spun off from the Hyosung Group in 2003, was bought by S&T Group in 2007 and renamed S&T Motors, and became KR Motors in 2014, which is why the same bike can carry different names on its paperwork. The key system stayed simple throughout. Hyosung's owner's manuals describe two ordinary ignition keys, a three-position switch with a steering lock, and seat and fuel cap locks that take the same key. The manuals do not describe a chip key or immobilizer.

We cut spare keys, make new keys when both originals are lost, repair worn ignition switches, extract broken keys, and fix seat, fuel cap and helmet locks, at your location in San Diego County, Ventura County, Santa Barbara or Goleta. Tell us the exact model and year when you book.

Hyosung key types by model and year

Years	Models	Key type	Chip	Notes
Carbureted and fuel-injected years	GT650, GT650S, GT650R (Comet 650)	cut key	no	Supplied with two ignition keys. The switch has ON, OFF and LOCK positions, and the rear seat lock under the front of the rear seat is opened with the ignition key.
Fuel-injected years	GT250R, GT250 (Comet 250)	cut key	no	Two ignition keys from the factory. The steering locks by pushing the key down at OFF and turning it to LOCK with the bars full left.
Fuel-injected years	GV250 Aquila	cut key with a stamped key number	no	Comes with a pair of identical keys stamped with an identifying number used for replacements. The ignition key also opens the seat lock and the fuel tank cap.
From around 2006	GV650 Aquila, ST7	cut key	no	The GV650 and ST7 service manual covers an ordinary ignition system, with no immobilizer or transponder section. The ST7 has a helmet holder by the seats.

Hyosung keys by model

Each page covers the key and immobilizer by year, which locks share the key, and what a lost-key job involves for that model.

Hyosung immobilizer and chip keys

Most Hyosung motorcycles have no immobilizer. The owner's manuals for the GT650 family, the GT250R and the GV250 describe a plain ignition key and a three-position switch, with no security light, code card or PIN, and the service manual for the GV650 and ST7 has no immobilizer section either. Starting the bike normally depends on a correctly cut key and nothing else.

Because security is mechanical, use the steering lock every time you park. Hyosung's manuals describe it the same way across models: bars full left, key to OFF, push down, turn to LOCK and remove the key. If a previous owner fitted an aftermarket alarm, tell us when you book.

Lost all your Hyosung keys?

When both keys are gone, we make a new one at the bike. We confirm your ownership, check whether a key number is available, and cut a key by number or from the lock itself. We then test it in the ignition, the steering lock, the seat lock and the fuel cap, which normally share the ignition key. If the ignition switch is worn or damaged, we can repair or replace it during the same visit.

Have your photo ID and the registration or title ready, with the VIN and the exact model and year. The title may show Hyosung, S&T or KR Motors as the maker depending on the year, and that is normal. Look in the owner's manual for the key number box, where the first owner may have written the number down.

Have this ready when you call or text

Year, make and model of the bike
Where the bike is parked
Whether you have any working key, a broken key or a key code
Photo ID and registration or title (we verify ownership before making a key)

Need a Hyosung key in Ventura & Santa Barbara?

Call or text with the year and model and where the bike is.

Call (805) 429-8452 Text your year, make and model

Or read first: all services · common questions · about us · contact details

Where to find your Hyosung key code

The GV250 owner's manual says an identifying number is stamped on the ignition keys, that this number is used when making replacement keys, and gives a box to write it in. The GT650 and GT250R manuals say neither, so on those bikes check any original key you still have and the paperwork from the sale. If the number was never recorded and both keys are lost, a key can usually still be made from the lock.

Hyosung dealer or mobile locksmith?

Hyosung's manuals point owners to a dealer for replacement keys by key number. Call the dealer first and ask whether they can still order a key for your model and year before hauling the bike anywhere. A mobile locksmith comes to the bike, cuts a key by number or from the lock, and can repair the ignition or extract a broken key on the spot, which keeps your original locks in service.

Hyosung models we make keys for

Hyosung key and lock services

Hyosung key FAQ

Does my Hyosung have a chip key?

The owner's manuals for the GT650, GT250R and GV250 describe an ordinary cut key with no immobilizer, and the GV650 and ST7 service manual lists none either. A correctly cut key is normally all that is needed, unless an aftermarket alarm was added.

Where is the key number on a Hyosung?

It is stamped on the ignition keys, and the owner's manual has a box where the number should be written down. Check the manual and any surviving key or tag.

I lost both Hyosung keys. Can you still make one?

Yes, in most cases. We confirm ownership with photo ID and the registration or title, then cut a key by number if you have it or from the lock if you do not, and test it in the ignition, seat and fuel cap.

Does one key work every lock on a Hyosung?

On a bike with its original locks, usually. The manuals have the ignition key opening the seat lock, and on the GV250 the fuel tank cap as well. A lock replaced on its own may take a different key.

My title says S&T or KR Motors. Is it still a Hyosung?

Yes. The motorcycle business was renamed S&T Motors in 2007 and KR Motors in 2014, so paperwork can carry any of the three names. Give us the model and year and we will match the lock hardware.

Where we work on Hyosung bikes

Lost the Key to Your Motorcycle Disc Lock or Chain?Start with the lock maker: most quality disc locks and chains come with a key number or code, and makers such as Kryptonite and Xena supply replacement keys against it.
Lost Your Only Motorcycle Key? What to Do NextIf you lost the only key to your motorcycle, a new one can almost always be made, but the route depends on whether your bike uses a plain metal key, a chipped transponder key, or a keyless fob.
Lost Your Motorcycle Key on a Ride, Far From HomeIf the key goes missing at a stop far from home, secure the bike where it stands, retrace the stop, and then gather the details a locksmith or dealer will need: your photo ID, registration, VIN, year, make and model, and any key number.

Other makes

Sources

Page last updated November 14, 2026.