This is the official control motor for all RCRA and ATS Events for 21.5T in 2018 and onwards!
The end-bells on these motors are NOT sealed. You are able to disassemble the motor, and time it as you wish up until the event. At the event, your motor will be inspected to ensure everything is in original condition, and the timing will be set to ensure a KV of 2400.
If you are not running RCRA or ATS events, or looking for a motor for club racing, then this motor is a great budget option to get your hands on the best motors in the business for club racing!