Even the replica Speed 900's have enough torque to get a feather going at a fair clip.

But 25A is low.
We simular problems with Kashei, and that started with a Scorpion XXL Ilyama version.
But 6S A123, 100mm wheels and a 4.5-1 gearratio is too much for those. The current limiting acted up from the start.
We solved that with a Sidewinder.

In Hannibalito III we still drive with the same drive, Speed 900, Scorpion XXL Ilyama version, 4.5-1 gearratio, 100mm wheels , but 4S A123. After all the years we use H III, no problems on the drive tough.

Satanix 1.666 flies around with Speed 900 6-1 gearratio to 130mm wheels, 5S LiPo and a set of Victors. No failures like you describe.


Fastest solution, try on a lower voltage.