Longest willy:
If you already know how to ride a short willie, try your best to keep the bike in the air. Press X as many times while the bike is still stable. When your player rocks back and forth real fast; then just hold down X and he will ride a willie as long as you want him to.

Speed burst:
When on an incline, keep clicking the clutch button while on an incline. Your speed will gradually get up to 80 mph. A good place to try it on is the incline to the jump when u start out at the shaffter freestyle course.

Unlock Every Level:
Go to the main menu and enter Up,Down,Left,Right

Girl in a hottub:
in the freestyle level vulture gult canyon you find a secret tunnel you go through it as fast as you can you will see 2 jumps take the second one!!! if you make it to the top you will see a girl in a hotttub

On Ground backflips:
message: first , come to a complete stop. also make sure that you are on level ground. then hold down back , and press/hold r2 and accelerate at the same time while holding down back until you do a complete flip. *NOTE* you must hold down back first, and then press/hold r2 and accelerate

Tricks:
Get some air, then hold the Trick button and press the indicated button(s) to do the corresponding move:

Bar Hop: Press Triangle(2).
Can Can: Press Square(2).
Cat Nac: Press X, Circle(2).
Catwalk: Press Square, Triangle.
Cliff Hanger: Press Circle, Triangle.
Coffin: Press Triangle, Circle.
Cordova: Press Circle, Triangle(2).
Disco Can: Press Square(3).
Heart Attack: Press X, Triangle.
Heart Breaker: Hold Analog-stick Down until you have done a complete flip.
Heel Clicker: Press Triangle.
Helicopter: Press X, Triangle(2).
Indian Air: Press X.
Kiss Of Death: Press Circle(2).
La-Z-Boy: Press Circle, X.
McMetz: Press Triangle(3).
Mulisha Air: Press X, Square.
Nac Nac: Press Square.
No Hander: Press Circle.
Nothing: Press Circle, Square .
Pendulum: Press Square, Circle.
Rocket Air: Press X, Circle.
Rodeo Air: Press Triangle, X.
Saran Wrap: Press Triangle, Square.
Seat Grab: Press X(2).
Suicide Flip: Hold Analog-stick Up until you have done a complete flip.
Superman Indian: Press X(3).
Switchblade: Press Square, X.

Hints:

Get on top the cliffside in Vulture Gulch:
After starting, hit the jump under the big arch(slightly to the right after leaving the truck trailer) and land padt the arch. Drive a few yards and look to your right. You'll see a very dark colored patch in the cliffside. turn back, drive around the small patch af trees(making a "U" turn), and drive slowly on the slanted path directly over the big dark patch. When on top the middle of the patch, turn yourself facing the top of the cliff. Drive at full speed up the cliff and don't stop until you reach the top. If it didn't work the first time, try again.

Easy way to get into the secret room in the Warehouse:
After you start, drive around the jump in front of you(drive to the right side of the jump). Going full speed, hit the largest jump facing the platform leading to the secret room. Preload before hitting the jump, and hit the jump diagnaly and make sure your tires leave the ramp's halfway point. If done correctly, you should be able to get enough air to reach the platform.

Easier way to get outside the Bus Jump:
After starting, drive to the school where the two glass tunnels are, down the "alley", and bail out at the far right corner. It should reset you on top the building(if it doesn't, try again). On top the building, drive to the corner on your left. Facing the corner with both sides of the wall equaly apart from you, do the bunny hop trick to get over the wall. Leval yourself out so you won't wreck. If done correctly, you can drive around outside the school.

Easier way to get outside Las Vegas:
After you start, turn 90 degrees to the right and drive to the "U" turn that sends you to the eighteen-wheeler jump. Once you reach the "U" turn, get on top of the hill in the center of the turn. If you face the truck jump, turn directly behind you and face the fence. There is one section of the fence that is lower than the rest. Under this fence section is a light patch of sand and a small gap seperating it from the fence section. Drive down the hill(that you are resting on) and hit the small jump in front of you. While in the air, turn your bike sideways and nearly flat. Right when you hit the ground, powerslide(R1) under the gap without wrecking. After patience and practice, you should be able to do it.