Originally Posted by v0rtex
Havent found that. I ran a pair in a CO27 without cutting that got at least 10 or 12 packs through, and it got quicker and quicker untill the serrations were just about gone - then it got slower. All I was doing was cleaning the comm and brushes with a comm stick each run.
The ROTM motors I've run with F's would get better after each run, and generally stayed that way not dropping off for some time.