X1 Stealth shipped after 20/01/2022: FE433Z2

X1 Pro: CSK25PP

Photon stage 1: FE420Z

Photon stage 2: 5476

Please note that if you have an X1 Stealth shipped after 20/01/2022, contact technical_support@cycmotor.com if you are having gearbox issues. All X1 Stealth models shipped after 20/01/2022 have updated gearboxes.