If you purchased a transponder at any motocross race last year your transponder will need to be reactivated for it to work this racing season.
All MYLAPS flex transponders have an expiration date. If you purchased your transponder from the MYLAPS site directly you choose how long your transponder would remain active. If you purchased it at the track it expires one year from when you activated it. Flex transponders are easily identified by a white bottom. Classic transponders with a black bottom never expire. X2 transponders say X2 on the front and are gray in color. You can tell if your flex transponder is activated by how fast the light blinks. An active transponder will blink once per second during charging and when off the charger displaying the life of the battery. A transponder that’s activation is expired will blink red twice per second on or off the charger.