SYM Citycom 300i and Citycom S Key Replacement

Quick answerThe SYM Citycom uses a plain cut key with no chip. The seat opens from the ignition switch and the fuel cap has a separate lock that takes the same key. Lose the key and you need a new one cut to the scooter's locks, with nothing to program.

SYM Citycom 300i and Citycom S key quick facts

SYM's Citycom manual shows an ignition switch position for the seat: insert the key, turn it to the left, and the seat releases.
The seat locks by being pushed down, which is why the manual warns not to put the key in the luggage box.
The fuel tank cap has its own lock. The ignition key goes in, turns left, and the cap lifts off.
To lock the steering, the handle is turned fully left and the key is pressed down and turned to the lock position.
SYM USA describes the Citycom S as having a 5 in 1 ignition key lock system.

SYM Citycom 300i and Citycom S key types by year

Years	Models	Key type	Chip	Notes
Earlier model, now discontinued	Citycom 300i	mechanical cut key	no	Seat release in the ignition switch, key-locked fuel tank cap, steering lock position. No immobilizer in the owner's manual.
Current model	Citycom S 300i	mechanical cut key	no	SYM USA lists the same owner's manual for it and advertises a 5 in 1 ignition key lock system.

One switch for start, seat and steering

The Citycom is SYM's large-wheel commuter, and its ignition switch does three jobs. The start position holds the key captive while the engine runs. The off position releases it. A further position to the left pops the seat, and a push-and-turn locks the steering with the bars at full left lock.

SYM's manual adds two warnings that tell you how owners get stuck. Never turn the key while the scooter is moving. And do not leave the key in the luggage compartment once the seat is unlocked, because the seat latches when it is pushed shut, with or without you holding the key.

Need a key for your Citycom S 300i?

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

Call (619) 775-1858 Text your year, make and model

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The fuel cap is a second lock

Unlike SYM's smaller scooters, where the fuel cap releases from the ignition or hides under the seat, the Citycom's cap carries its own cylinder. The ignition key is inserted in the cap and turned left to remove it. To refit, the cap goes back on, the key is turned right until it locks, and the key comes out.

That means two cylinders have to agree with your key. A worn key can start to bind in one lock before the other, so check both when you have a spare cut.

Citycom lock problems to know about

Key shut under the seat after a stop, which the manual warns about
A fuel cap that will not release, on a scooter with a nearly empty tank
A steering lock that feels jammed because the bars were not turned fully left before the key was pressed down
A replaced ignition switch or fuel cap, which can leave the two locks on different keys

Replacing a lost Citycom key

We check photo ID with the registration or title, then cut a key to the scooter and try it in every function: start, off, seat release, steering lock and the fuel cap. If the ignition and fuel cap no longer match each other because a part was changed, we will tell you, and the two can be brought back onto one key.

There is no chip in the key, so there is no programming and no dealer-only step.

Where to find the key code

SYM's Citycom manual does not describe a key code tag or a page for recording a key number. Check your original keys and key ring for a stamped number and look through the dealer's delivery paperwork. If there is no code, the key is made from the locks on the scooter.

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)

SYM Citycom 300i and Citycom S key FAQ

Does the SYM Citycom 300i have an immobilizer?

No. The owner's manual describes a mechanical key and a steering lock, with no transponder or immobilizer.

How does the Citycom seat open?

From the ignition switch. Insert the key and turn it to the left to the seat position. It locks again when pushed down.

Is the Citycom fuel cap on the same key as the ignition?

Yes, from the factory. The cap has its own lock but takes the ignition key.

I locked my only key under the seat. Can it be opened without damage?

Yes. The seat can be opened through its release mechanism. Do not pull on the seat base, which bends it and can break the latch.

More SYM models

Services for this bike

Locked Your Keys Under the Motorcycle or Scooter Seat?Keys get locked under the seat because most seats latch shut with a push and need no key to close.
One Key for All Your Motorcycle Locks: Keying AlikeA motorcycle that needs different keys for the ignition, fuel cap and seat has almost always had a lock replaced.
Scooter Key Replacement: Shutters, Seat Locks and ChipsYes, a key can be made for almost any scooter, and on most 50cc to 150cc models it is a plain metal key with no chip.
Worn or Bent Motorcycle Key: Signs, Risks and the Right FixA worn motorcycle key shows up as a key that needs wiggling, works in one lock but not another, or works worse than the spare.

Where we come to you

Sources

Page last updated November 14, 2026.