To unlock the G Ride ATV and all the G Ride gear you must have a save file from ATV Offroad Fury (the first one) on your memory card. Thats about it. When you start up your game, if you have already made a profile, you will get a message telling you that you have been rewarded for having ATV Offroad Fury save data on your memory card with the G Ride ATV and the G Ride gear. Have Fun!!!
For Supercross events it's better to have a hard suspension because there will be many bumps and jumps. For Enduro it's better to have a soft suspension because of turning difficulties. A soft suspension gives you less suspension and more traction which enables you to turn easier on changing ground types
Do freestyle with no objectives or time. Then run in a straight line for a while, just STRAIGHT. You will come up on a big hill that surrounds the area in all places exept the stadium. Go up it and the land should get real flat. Keep going and a force will fling you wayyyyyyy down and it's funny to watch him fly real far. Also if you fall from a great height with the male rider, sometimes he will scream like a girl.