Ok guys so heres the deal. I got a new aa jet about 3 weeks ago been pretty good to it no smashing it and what not. So anyways 2 days ago i try it and one motors not working. I think Wthef? and i give it a flick it works fine. Then today it doe it again but the motor is much slower now. I tried oil and compressed air. it seems as though the motor only powers the shaft when its in a certain position so the momentum of the power going through that position carries it through the "dead zone" but only when it doesnt start in the "dead zone" it leads to an overall slower motor. I have a leftover motor from my other jet that i could use but i am afraid to switch them as previous attempts on bipes have not been successful. any ideas?

There has been some success in removing debris resulting from brush wear which can cause a similar problem by dipping the motor in rubbing alcohol.

Originally Posted by Martyn McKinney

There has been some success in removing debris resulting from brush wear which can cause a similar problem by dipping the motor in rubbing alcohol.

Yes but my motor is still attached, do i completely submerge it or just the shaft end?

Completely submerge it and run it at the same time.

A dark residue from the brush debris should appear.