Yamaha Majesty 400 and Morphous Key Replacement

Quick answerThe Majesty 400 and the Morphous are Yamaha's older maxi-scooters, from before the smart key XMAX. Both use a plain cut key, and the US owner's manuals for the 2006 to 2010 Majesty and the 2006 to 2008 Morphous have no immobilizer section. On both, the seat is opened from the main switch, and both have a keyed front storage compartment and a keyed fuel cap under a lid. The Morphous adds a keyed trunk.

Yamaha Majesty 400 and Morphous key quick facts

The 2006, 2007, 2008 and 2010 Majesty 400 (YP400) and 2006, 2007 and 2008 Morphous (CP250) US manuals have no immobilizer section.
Majesty: the rider seat is opened by inserting the key into the main switch. There is no separate seat keyhole.
Majesty: front storage compartment A has a key lock. Compartment B opens with a lever and no key.
Majesty: the rear storage compartment under the seats is sized for two helmets, according to the manual.
Morphous: the seat opens by turning the key counterclockwise in the main switch to OPEN, and the helmet holder is on the underside of the seat. Storage compartment A and the trunk each have a key lock.

Yamaha Majesty 400 and Morphous key types by year

Years	Models	Key type	Chip	Notes
2006-2010	Majesty 400 (YP400, US market)	mechanical cut key	no	Main switch with steering lock and seat release, keyed front storage compartment A, and a keyed fuel cap under a lid opened by a sliding lever.
2006-2008	Morphous (CP250, US market)	mechanical cut key	no	Main switch with steering lock and seat OPEN position, keyed storage compartment A, keyed trunk, and a keyed fuel cap under a lid.
Later maxi-scooters	XMAX and TMAX	smart key fob	yes	A different system altogether. Do not order a Majesty-style key for a smart key scooter.

Maxi-scooters before the smart key

The Majesty 400 arrived in the US for 2005 as a freeway-capable commuter. The long, low Morphous 250 appeared alongside it from 2006. Today's XMAX uses a fob and an emergency code card, and people sometimes assume the older scooters do too. They do not. The Majesty and Morphous manuals from Yamaha Motor Corporation, U.S.A. describe a metal key, a main switch and a steering lock, with no immobilizer chapter.

Need a key for your Majesty 400?

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Majesty 400 locks and storage

The Majesty also has a rear brake lock lever for parking, which is a brake control and not a keyed lock. It gets mistaken for an anti-theft device.

Main switch: ignition, steering lock (push the key in from OFF and turn to LOCK with the bars full left) and the release for the rider seat.
Front storage compartment A: keyed. Turn the key counterclockwise to unlock, then press the button and pull. To lock, close the lid and turn the key clockwise.
Front storage compartment B: a lever only. The manual warns against putting heavy items in it.
Rear storage compartment: under the seats, big enough for two helmets.
Fuel tank cap: under a lid that opens with a sliding lever. The cap itself unlocks with the key, turned clockwise.

Morphous locks and storage

The Morphous is opened the way a Vino is, only larger. With the scooter on the centerstand the key is turned counterclockwise in the main switch to OPEN, without pushing in, and the long seat folds up. The helmet holder is on the bottom of the seat and comes with a cable for securing a helmet. Three more places take the key: storage compartment A, which locks and unlocks like the Majesty's, the trunk, and the fuel cap under its lid.

Where these scooters give trouble

Because the seat release is part of the main switch, a worn key or switch can show up as a seat that will not pop. Sometimes it is the key, worn until it no longer reaches the release position cleanly. Sometimes it is the release mechanism between the switch and the seat latch. The keyed front compartment is the other one to watch, because it is where registration papers tend to be kept and it may go a long time without being unlocked.

If the seat is stuck shut with your helmet or documents inside, do not pry the seat base. It can be opened from the mechanism without marking the bodywork.

All keys lost

We check your photo ID and whatever ownership paperwork you can reach, bearing in mind the registration may be locked in the scooter. If it is, tell us when you call and we will explain how we handle that. Then we cut a key to the scooter, test every switch position including the seat release, and test the fuel cap, compartment A and, on a Morphous, the trunk. No programming is involved on either model.

Where to find the key code

The Majesty manual says the key identification number is stamped into the key tag and should be recorded in the space provided. The Morphous manual has the same line for recording it. Without the tag, the key is cut from the scooter's locks.

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 Majesty 400 and Morphous key FAQ

Does the Majesty 400 have a smart key like the XMAX?

No. The 2006 to 2010 US manuals show a plain metal key and no immobilizer. The smart key arrived on later Yamaha maxi-scooters.

Where is the seat lock on a Majesty or Morphous?

There is not a separate one. The seat is released from the main switch with the ignition key.

My registration is locked in the Majesty glovebox and I lost the key. Can you still help?

Yes. Bring your photo ID and tell us where the paperwork is. Once the compartment is open we confirm the registration matches before cutting a key to keep.

The key turns but my Morphous seat will not open. Is that a key problem?

It can be a worn key or a latch or cable fault. We check the key against the lock first, since that is the simpler fix, then the release mechanism.

More Yamaha models

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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.
Proof of Ownership for a Motorcycle Key in CaliforniaA legitimate California locksmith will ask for photo ID plus the motorcycle's registration or title before making a key, because state law requires locksmiths to record your ID, the bike's VIN and registration details, and your signature for every vehicle key they originate.
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.

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Sources

Page last updated November 14, 2026.