i have a fuze 6800 kv system...the motor does tear down so you can clean it out, and replace/clean bearings...i just cleaned mine out but messed up putting the output shaft bearing in with a screwdriver instead of a socket...now the output shaft bearing is broke...thats the only problem ive had with my fuze system. its great and on 2s 4000 mah 25 c its a rocket...when i first put it in, i had the body on my sc10 and coming down the street it tried to take off...if only it had wings! lol