The original starter and alternator are easily rebuildable. The starter can be a pain to remove since you have to make a few tools IE a short allen wrench piece... but in honesty once you have done it a couple times, it becomes fairly easy. The starter is super simple to refresh. Out of the 6 I've now redone, only 1 was actually beyond the point of repair, because it was literally burned up inside. I'm talking the guts melted, someone REALLY got on that one... If your starters is acting up take it as the sign to drop it tear it down and clean, lube it. Sandpaper and a good high temp grease are your friend.