i can just lean back while moving pull up a little and give it a little gas and it will come right up, and won't go down until i let it. i can go a far as the space i have to do it in. Mine will also wheelie to much just taking off from a dead stop if your not carefull enough you really have to lean forward on my to keep it down if your going to take off fast. It took me awhile to get good so just keep trying.

 

Thanks to all those who replied. I think i'm giving it to much throttle to bring it up and then i let off to fast because it feels like it's going to tip backwards.
Anwyays i'm just going keep trying until i get it right. I'm going to try sitting all the way back instead of standing up.

thanks again.