I have been riding for 2 years now;so i'm going to give you tips on the track,hills,and trails.
TRACK:For jumps go into 2nd gear or 3rd gear ; when turning shift down.
[unless in 2nd]
HILLS:No matter what size hill, stay in 2nd gear. [go fast on steep hills watch out for rocks though]
TRAILS:I reccomend 2nd, but unless you're a beginner go into 3rd.
Jeremy McGrath, good, yes; nice,don't know.
The supercross last year was pretty good even though Jeremy messed up because one stupid berm, which put Carmichael in the lead to win; pulling off a sweet Nac-Nac.
Carey Hart, old news, I don't think so; a few years ago he pulled off a sweet backflip almost killing himself; and with that one trick plus more, he won the gravity games.
Right after he landed the flip; about 10 people tackled him suprisingly.
This year of dirtbiking I think Jeremy Mcgrath will win, unless he messes up again, then CarMichael will probaly.
I personally think they should put atvs in the X-Games;because we're better I think that's why we're in and not them. But I think we should let them in.