BMAX gearing advice

[arransmith27]

I race my BMAX indoors on carpet (approx 15m straight with a very tight and twisty infield, the track is 5 rolls of carpet wide), and was looking for advice with gearing.

I used a 10.5 brushless geared with a 23 pinion and an 81 tooth spur, but sadly my motor overheated so badly during a 6 minute practice run that it is now dead

What gearing would should I use in future to ensure that this costly mistake doesn't happen again ?