Yamaha YP250R 2005 Service Manual page 354

Voiding a standard key code:
If a registered standard key has been lost and you want to disable its use, register a new standard
key or re-register the other standard key. For registration of a standard key, refer to "Standard key
registration:".
Standard key registration erases the stored standard key codes from memory, therefore, the lost
standard key is disabled.
Main
switch
Standard key
code voiding
LED
method
less than 3.0 s less than 10.0 s less than 3.0 s
ON
Code re-regis-
tering key
OFF
On
Off
IMMOBILIZER SYSTEM
Remaining
standard key
Registration mode
0.5 s 0.5 s
8 - 60
ELEC
10.0 s less than 3.0 s
Code re-regis-
tering key
If the immobilizer system indicator light
stops flashing 5 seconds after the first
standard key is registered, the second
standard key cannot be registered.
– +