Greasing the bafang ultra

[DDBB]

I now have 2,300mi. on the motor and it's never been opened up. It's just as quiet now as it was on day one. I figured I'd wait until it got a little noisy before attempting maintenance but that hasn't happened. Am I wearing out my gears by not re-greasing? Worst case scenario I'll wait until winter but I might end up with another 1,000mi. by then