I knew sorta that you were having a footing problem, the grab bars at the place I metioned have ample foot room for standing in them. also what josh said is right. practice practice practice, and you'll be fine.
garret~

 

i use a homemade wheeliebar fabricated from scrap iron and a castor wheel bolted to the tow hitch. a castor wheel is about 5-6 inches in diameter and can be found at lowes or home depot.

 

what i did to do a straight up wheelie when i only had my pipe was i would hold the brake and do a burnout and when the tires start spinning at the right speed lean back and let out the brake real fast at the same time(my back brakes dont work no more from this). but i dont know if you even havve enough power to do that because i never tried it when it was stock, but good luck.