To me, i race a 2001 mars air elite, it's the more than regular maintenance that your 'suppose' to do on it. I think the manual states that your supposed to clean and rebuild something like every 10 hours or some ridicules number like that. For me that would be every week. that's just too much. she see's some maintenance but not near that often.
I have had to have it factory rebuilt but it was under warrantee and got no hassle from them. They even found a crack and replaced everything but the outer’s for free