very easy solution, u just buy a bumper for the front then get a big, brave fat guy to sit on the bumper and hammer the throttle and i guarantee that the front wheels won't leave the ground!!

 

Softening the rear end and/or tieing it down would transfer more weight to the rear and lighten the front end..

 

Transfering body weight to the front end will help
the most. Feathering the clutch will also help but it will slow you down. Stiffening up the rear and softening the front shocks will transfer more weight to the front end.

 

I made brackets that lift up the front shocks 1 3/4" which lowers the front of your bike which will also keep your bike from wheeling. It makes it corner a hell of alot better to.