Originally posted by DOMOisCOOL
So these are the common symptons of this problem?
Yep, if you've done over twenty runs on race brushes you can start to have problems. If you want the comm and bushes to last ages try some reedy 766 brushes, you'll have a touch less power but they'll last a long time. I generally cut my comm once a race day and either re-serrate or replace the brushes.