Ducati Monster 600, 750 and 900 Key Replacement

Quick answerThe original carbureted Monsters, the 600, 750 and 900, use a plain metal key. Ducati's owner's manual for these bikes says they were delivered with two universal keys, and it has no immobilizer section. A lost key is solved by cutting a new one to the bike's locks. The fuel-injected Monsters that followed are different, so check the last row of the table if your bike has a red key or a Code Card.

Ducati Monster 600, 750 and 900 key quick facts

The owner's manual covering the Monster 600, 750 and 900, including the Dark and City versions, was printed in 1998 and says the bike was delivered with two universal keys for the ignition, steering lock and seat catch.
The tank filler plug has a protective lid; the ignition key goes in underneath and turns a quarter turn clockwise.
The manual also lists a hook for a helmet fastening cable.
No immobilizer, red key or Code Card appears in that manual.
Ducati's owner's manual for the later fuel-injected Monster 620 describes an immobilizer, three keys and a Code Card.

Ducati Monster 600, 750 and 900 key types by year

Years	Models	Key type	Chip	Notes
1993-2002	Monster 600, 750, 900 with carburetors, including Dark and City	mechanical cut key	no	Two universal keys. One key for ignition, steering lock, seat catch and tank plug.
2000-2005	Fuel-injected Monsters before 2006, such as the 900 i.e., S4, 620 i.e. and S4R	plain key or red-key transponder set, by bike	varies	Ducati brought in the immobilizer during these years, and the Monster 620 owner's manual describes it with three keys and a Code Card. A red key or a Code Card means your bike has it. Tell us the year and we confirm. From 2006 on, see our Monster 620, 695, S2R and S4R page.

The simplest Ducati key there is

A carbureted Monster has no electronics watching the key. If the blade matches the lock, the ignition turns and the bike will start. Ducati called the keys universal because a single key was meant to work every lock, and gave owners two of them.

This makes the early Monster one of the friendlier Ducatis to own from a key standpoint. A spare is quick and inexpensive, any worn key can be remade to the original cut, and losing every key does not involve the dash or the engine computer.

Need a key for your Monster 600?

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

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

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Ignition, tank and seat

Key-operated ignition switch with built-in steering lock
Tank filler plug under a hinged protection lid
Seat catch: the manual has you insert the key in the lock and then use a lever to release the seat
Hook for a helmet fastening cable

Thirty years of wear, and other people's modifications

Motorcycles this old are often modified. A relocated ignition switch, a replacement top triple or a swapped tank can each leave a bike with mismatched locks, so one key for the ignition and another for the tank is not unusual on an older machine.

On a bike this age the ignition switch can simply be worn. Signs of that are a key that only works at a certain angle, a dash that flickers when the key is touched, or a key that pulls out in the ON position. That last one is a sign of a badly worn lock and should be dealt with, since the key can fall out on the road.

Mismatched locks can be rekeyed so one key does everything again
A worn ignition can often be repaired; if it cannot, it is replaced and matched to your key
A fuel cap lock can seize from water and old fuel residue; do not force the key

No keys

Project bikes and barn finds often arrive without keys. We confirm ownership with photo ID and the title or registration. If the paperwork is still in progress, tell us what you have. Then a key is made to the ignition and tried in the tank plug and seat catch. Where those locks came from other bikes, we can key them alike on the same visit. If your Monster turns out to be an injected bike with an immobilizer, the job changes, and we will say so before quoting.

Where to find the key code

Check the original document pouch for any tag or plate that came with the two keys. On a bike this old the number is frequently lost, and that is fine: the key can be 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)

Ducati Monster 600, 750 and 900 key FAQ

Is there a chip in a Monster 900 key?

Not on the carbureted bikes. The owner's manual for the Monster 600, 750 and 900 describes two universal keys and no immobilizer. Later injected Monsters did get chipped keys, so check for a red key or Code Card.

My Monster has a red key. Is this the right page?

A red key means your bike has Ducati's three-key immobilizer. That system is covered on our Monster 620, 695, S2R and S4R page, and the same rules about the red key apply.

The key comes out of my Monster's ignition while it is running. Is that normal?

No. It means the ignition lock or the key is badly worn. Have it repaired, because a key that drops out can be lost on the road and leave you stranded at the next stop.

Can you make a key for a Monster project bike with no keys?

Yes, once ownership is shown. With no immobilizer on the carbureted models, a key cut to the locks is all the bike needs.

More Ducati models

Services for this bike

Vintage and Classic Motorcycle Keys: Codes, Blanks, WearA key can usually be made for a vintage motorcycle even when no original survives, because these are plain mechanical locks with no chip.
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.
Auction or Salvage Motorcycle With No Keys: What to ExpectA motorcycle from Copart, IAA or a lien sale can get new keys once you hold paperwork that ties you to the VIN: a title or Salvage Certificate endorsed to you, or the lien sale certification packet, plus a bill of sale and your photo ID.
Corroded Motorcycle Locks From Salt Air: Signs and CareSalt air corrodes the small parts inside ignition, seat and fuel cap locks, and the first signs are a gritty key, a lock that needs a second try, or a little-used lock that stops working.

Where we come to you

Sources

Page last updated November 14, 2026.