fragile spur gears???

[neweuser]

You could have Mike make a 14 pinion for you. Otherwise, put a heatsink on the motor...

[jhautz]

In my experience with the 9L 14 cells tends to make the motor very hot. You are spinning it almost 45,000 rpm at that rpm its gonna get hot. I have much better luck w/ the 9L when I keep it down to 12 cells or 4s lipo.

At 14 cells and the 9L you will constantly be fighting excess motor heat. 14 cells works, but its really pushing it.

I have no problem running a 9L, BK9920, 16/66 in an emaxx on 4s lipo or 12 cells. I can run it all day and never get the motor or esc over 120. But just to be sure I have a small fan on both the motor and esc.

If you continue to have heat issues, I'd cut down the cell count.

Edit: Or get a bigger motor...