Yamaha XMAX and TMAX Key Replacement

Quick answerThe XMAX and the smart key TMAX do not use a conventional ignition key. They use Yamaha's Smart Key System, a fob that has to be near the scooter, backed by a code on a card. If you have lost the fob but kept the code, the owner's manual describes a way to start the scooter and a dealer can register a new fob. If the fob and the code are both gone, Yamaha says the entire smart key system has to be replaced.

Yamaha XMAX and TMAX key quick facts

Yamaha's US site says the XMAX Smart Key System enables keyless starting, fuel tank and storage compartment access, and the handlebar lock.
Yamaha's 2021 US dealer bulletin lists the XMAX and TMAX as smart key models supplied with one smart key and an emergency code card.
An XMAX owner's manual lists one smart key, two mechanical keys and one identification number card, and says the number is also inside the smart key. What is in the set can vary by market.
The XMAX manual gives the smart key's range as about 80 cm from the main switch.
On the TMAX the mechanical key is stored inside the smart key body and pulls out.
The TMAX manual says up to six smart keys can be registered to the same vehicle.

Yamaha XMAX and TMAX key types by year

Years	Models	Key type	Chip	Notes
Smart key model years	XMAX	Yamaha smart key fob, mechanical key, code card	yes	No conventional ignition key. The fob must be on and within range.
Smart key model years	TMAX	Yamaha smart key fob with a mechanical key stored in it, code card	yes	The mechanical key pulls out of the smart key body.

What the smart key does on these scooters

On the XMAX everything runs through the fob. Yamaha's own description is that the Smart Key System enables keyless starting, fuel tank and storage compartment access, and the handlebar lock. In practice that means a missing or dead fob locks you out of the seat storage and the fuel filler as well as the engine.

The manual explains the routine. With the fob within about 80 cm of the main switch, the scooter confirms it and the smart key indicator light comes on for about four seconds, during which the main switch can be turned. If the switch is left in the OPEN position for three minutes, a beeper sounds as a reminder. The fob has its own on and off switch, and a fob that has been switched off will not be recognized even when it is right next to the scooter.

Need a key for your XMAX?

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The card is as important as the fob

Every one of these scooters has a number tied to its smart key system. Yamaha's US bulletin calls it the smart key emergency code and says it is on a card supplied with the scooter. The owner's manual calls it the identification number and says it is on the card and on the inside of the smart key itself. Yamaha states that it does not keep a record of the code, and tells dealers to write it on the predelivery inspection sheet and in the owner's manual.

The manual's advice is to keep the card, and a mechanical key, in a safe place away from the vehicle. Under the seat is not that place.

Fob lost, code known: the manual has an emergency mode for starting the scooter with the identification number and the mechanical key, and a dealer can supply and register a new smart key.
Fob working, card lost: write down the number from inside the smart key today.
Fob and code both lost: Yamaha says the entire smart key system will need to be replaced.

When the fob is not detected

Before assuming the worst, check the simple causes the manual lists. Make sure the fob is switched on. Replace its battery: Yamaha puts battery life at roughly two years, and says a flashing smart key system indicator for about 20 seconds at power-on is the signal to change it. Keep the fob away from strong magnets and do not store it in a compartment on the scooter, where heat and vibration can damage it. If a new battery changes nothing, the manual sends you to a Yamaha dealer.

Who to call

Spare and replacement smart keys are arranged through a Yamaha dealer according to the manual, and so is a full system replacement. We can help with the parts of the problem that are locks and keys: mechanical keys, a seat or storage lock that will not release, and working out from your fob, card and paperwork which situation you are in before you pay for a tow. Have your photo ID, registration or title, and the VIN ready.

Where to find the key code

The number that matters on these scooters is the smart key emergency code, also called the identification number. It is printed on the card that came with the scooter and, per the XMAX manual, inside the smart key. The dealer may also have written it on the predelivery inspection sheet or in your owner's manual.

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)

Yamaha XMAX and TMAX key FAQ

Can I start my XMAX if I lost the smart key?

If you have the identification number and the mechanical key, the owner's manual describes an emergency mode for that. Without the number, Yamaha says the smart key system has to be replaced.

Where is the XMAX smart key code?

On the card supplied with the scooter and, according to the XMAX owner's manual, on the inside of the smart key itself. Check the owner's manual too, since dealers are told to write it there.

Can a second smart key be added to a TMAX?

Yes. The TMAX manual says up to six smart keys can be registered for the same vehicle and directs owners to a Yamaha dealer for spares.

My XMAX seat will not open and the fob seems dead. What first?

Check that the fob is switched on and fit a fresh battery. The seat, fuel lid and starting all depend on the scooter recognizing the fob.

The immobilizer system on this bike

Yamaha Smart Key: Code Card, Lost Fob and Emergency ModeYamaha's Smart Key System is a keyless fob that lets you switch on, start and unlock the bike or scooter without inserting a key.

More Yamaha models

Services for this bike

Keyless Motorcycle Not Detecting the Key: Causes and BackupsOwner's manuals give a short list of reasons a keyless bike fails to detect its fob: a weak fob battery, the fob carried against a phone, laptop or metal object, strong radio interference nearby, the fob switched off or out of range, and a low battery on the bike itself.
Motorcycle Key Fob Battery Replacement by MakeMost motorcycle key fobs run on a single 3 volt coin cell.
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.
Kawasaki KIPASS Warnings: NO TRANSPONDER and OthersOn a Kawasaki Concours 14, NO TRANSPONDER means the bike cannot find its KIPASS fob nearby, and you have about 10 seconds, while the warning symbol is showing, to bring a registered fob back and switch on again.

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Page last updated November 14, 2026.