Getting paid for wheelies is tough. Find a flat, straight piece
of land with few cars (the back of the docks, near the "C" on
the screen works well) and try it with a moped.
To get the moped to wheelie, it\'s easiet to hit reverse for a
second, then gas it and pull back. Like someone else said,
they have to be long (5-6 secs) before you get anything.
Stoppies are much easier. Try them with the moped, as
well (It seems like they are easiest on the \'ped). You only
have to hold up for 2 seconds to get $$$ for those.
Just lean forward, and hit both brakes to start the stoppie.
After that, you can just use the handbrake and even a little
gas to keep on going. I can usually do stoppies for a while,
and then the bike/moped will start to turn, and it\'s lights
out from there...