You can not get the handlebars free, I take it?
The center bolt of the handlebars draws up a wedge that expands the handle bar post inside the steering stem. Loosen the bolt a few turns and tap the head down with a hard plastic mallet to free the wedge. The 'bars may still be stuck, but straddling the forks with your legs to hold them steady, you should be able to twist the 'bars back and forth and wriggle the handlebars up out of the steering stem.
Then you should be able to completely loosen the top bearing nut and withdraw cover and the race. Beyond that I do not know the specifics for the 2-3/4hp, but assume it follows conventional bicycle/motorcycle practice. That is the bearing balls will be loose and fall out onto the ground, where you will never be able to find every last one. I am not sure if the 2-3/4hp has that endearing trait of some other makes, namely, you can also drop a ball or two down into the frame tube!
-Doug