non-fixie
Finally riding a big boys bike
I haven't seen this particular lock before, but I am familiar with the flat keys.
How they usually work is that you open the lock by pushing the key in the slot. When the lock is open, the key is locked in position. By closing the lock you disengage the key again.
The bend in the key doesn't look OEM to me, so you may have to straighten it for it to be able to engage the mechanism correctly. It needs to go in fully.
I would expect the lock to contain a spring which opens the lock when the key is pressed in position (and also keeps the locking bar out of the spokes while riding).
How they usually work is that you open the lock by pushing the key in the slot. When the lock is open, the key is locked in position. By closing the lock you disengage the key again.
The bend in the key doesn't look OEM to me, so you may have to straighten it for it to be able to engage the mechanism correctly. It needs to go in fully.
I would expect the lock to contain a spring which opens the lock when the key is pressed in position (and also keeps the locking bar out of the spokes while riding).