Originally Posted by Dragonfire
Lucky you.... With one single exception every YR fan we have had has failed on battery voltage in two racemeets. They are pretty good up until then but why chance it? The MM fan is better on BEC voltage so thats all I use now and it does enough.
Did you run the YR fan in for ~8 hours first ?
I have done so to all my YR fans, and they're still running perfectly.
I usually give them 8 hours at 4.8v, then clean the bearing, and re-lube.