Hyosung GT650, GT650S and GT650R Key Replacement

Quick answerThe Hyosung GT650 family, naked, half-faired S and fully faired R, uses a plain cut key with no immobilizer. Two keys came with each bike. The ignition key also opens the rear seat lock, which is how you reach the tool kit and trunk. A lost key is replaced by cutting a new one to the locks, with no programming.

Hyosung GT650, GT650S and GT650R key quick facts

Hyosung's GT650 owner's manual, which also covers the GT650S and GT650R, says the motorcycles come equipped with two ignition keys.
The ignition switch has ON, OFF and LOCK. The key cannot be removed at ON.
To lock the steering: bars fully left, key to OFF, push the key down, let it come up and turn to LOCK.
The rear seat lock is in the frame cover under the front side of the rear seat. The ignition key goes in and turns clockwise.
The front seat is held by two mounting bolts at its rear edge, and the tool kit is strapped to the back of the rear seat.

Hyosung GT650, GT650S and GT650R key types by year

Years	Models	Key type	Chip	Notes
Carbureted years	GT650, GT650S, GT650R (Comet 650)	mechanical cut key, two supplied	no	Three-position ignition with steering lock. No security light, code card or PIN in the owner's manual.
Fuel-injected years	GT650, GT650S, GT650R (EI versions)	mechanical cut key, two supplied	no	Same key arrangement. The manual for the fuel-injected bikes describes the same switch and rear seat lock.

A V-twin sportbike with no chip

Riders coming from Japanese or European 650s often assume the GT650R must have an immobilizer. Hyosung's owner's manual says otherwise. It describes two ignition keys, a three-position switch and a steering lock, and that is the whole security system. The same manual is listed as suitable for the GT650, the GT650S and the GT650R in their fuel-injected forms.

The practical upshot: any correctly cut key starts the engine. If every key is lost, there is no control unit to replace and no dealer coding session.

Need a key for your GT650?

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

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

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

The steering lock has a knack

Hyosung's lock sequence is slightly unusual and catches new owners. You turn the handlebars all the way left and bring the key to OFF. Then you push the key down from OFF, release it so it comes up again, and turn it to LOCK before removing it. People who simply try to twist from OFF to LOCK find the key will not go, and conclude the lock is seized. The manual also warns never to turn the switch to OFF or LOCK while the motorcycle is moving, and never to try to move the bike with the steering locked.

Rear seat lock, trunk and tool kit

The second lock on a GT650 is easy to miss. Hyosung puts the rear seat lock in the frame cover, under the front side of the rear seat. Insert the ignition key, turn it clockwise, and the rear seat lifts away. The tool kit is held to the underside of that seat with a rubber band, and the small trunk space is underneath. To refit the seat, its hook slides into the retainer and you push down until it snaps locked. The manual cautions that an unlocked rear seat could cause a serious accident, so check that it has latched.

The front seat is different. It is not on a lock at all. Two bolts at the rear of the front seat hold it down.

Lost key service for a GT650

We verify ownership with photo ID and the registration or title, then make a key to the motorcycle where it is parked. It is tested in the ignition, through the push-and-turn to LOCK, in the rear seat lock and in the fuel tank cap. We also look at the condition of the switch while we are there. On any older motorcycle, an ignition that has carried a heavy key ring for years can be worn, and that is better found while parked than on the road.

If a previous owner fitted an aftermarket alarm, mention it when you book.

Where to find the key code

The GT650 owner's manual says the bikes come with two ignition keys and to keep the spare in a safe place. It does not describe a key number, so check any original key and the dealer paperwork for a stamped number, but do not count on one. If both keys are gone, the key is made from the lock.

What to have ready

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)

Hyosung GT650, GT650S and GT650R key FAQ

Does the Hyosung GT650R have an immobilizer?

No. The owner's manual describes two plain ignition keys and a three-position switch, with no security light, code card or PIN.

My GT650 key won't turn to LOCK. Is the steering lock broken?

Try the manual's sequence: bars fully left, key at OFF, push the key down, let it rise, then turn to LOCK. It will not turn straight across without the push.

Where is the seat lock on a GT650?

In the frame cover under the front side of the rear seat. The ignition key turns clockwise to release the rear seat.

Are GT650, GT650S and GT650R keys the same type?

Yes. One owner's manual covers all three, and all use the same kind of plain cut key.

More Hyosung models

Services for this bike

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.
Motorcycle Steering Lock Explained: How It Works and JamsA steering lock, called a fork lock by Harley-Davidson, is a bolt that holds the front end turned to one side so the bike cannot be wheeled away in a straight line.
Signs Your Motorcycle Ignition Switch Is FailingA motorcycle ignition switch is two parts in one housing: a lock cylinder that reads the key and an electrical switch that powers the bike.
Can a Locksmith Make a Motorcycle Key From the VIN?Sometimes, but not directly.

Where we come to you

Sources

Page last updated November 14, 2026.