how come when ever l come off the jump the rear end off my fourwheeler drops down. like is does not fall off my four wheeler or nothing like that. it like just goes down instead off stay level with the rest of the four wheeler. it basically does a wheely through the air.

It could be many things, your position on quad, the pitch of the jump, even the type of quad.. anyway you want it to be up a little in the front for a good balanced landing. You can chip teeth if your front hits first and hard.

And this is in the Motorcycle Racing section Because....

Sometimes if you are staying on the gas all the way through the jump, it will raise the front end up. l usually stay on the gas all the way until the lip, and then back off ever so slightly. This usually helps me keep it level and ready for the downslope. Also, depending on how big of jump it is, sometimes you can tap the rear brakes to help bring the front end down, but if you do it to hard, you could possibly kill the bike, which would not be good. This takes lots of practice.