thanx guys
I just found something about ballracers ,I clean them with motor cleaner then burn them with lighter result extremely free and fast ballracers but If I apply some oil as a lubricant that oil makes their spinning slower and much harder...
I usually apply some Molly (black like grease) to the drive shafts...is that ok?
do you apply wd40 to your cars?
many thanx for the tips...