[R2K2D2]

Efficiency is a huge thing when it comes to drive trains. You have to make sure that your holes where the shafts mount are drilled straight, and that everything aligns properly. If it does not, it is definitely worth the time to redo whatever part that may be and fix the problem. This may not be the easiest thing to do, but you will be glad you did it in the long run. Make sure you are locked in the right position, make sure you are aligned, right tension in chain, no wheel slippage. Also, if you have the current sensors installed, then use them to the full advantage! Run a dashboard and see what kind of numbers you are pulling when the breakers trip, that way, you can setup your gear ratios to match that current output, and won't trip the breakers. I am an electronics guy myself, so this is why i suggest this route. If you are tripping because of the wrong gear ratios used in your drive, see where the breaker trips, and then calculate the gear ratio such that you cannot pull that much current and thus not trip your breaker.

Good luck!!