I have been working on circle wheelies, but everytime I start to turn to go into the circle I get 1/4 way around and then all of a sudden the bike vears off in the opposite direction. Does anyone know why it is doing this? and how do I prevent it? Thanks.

 

put more weight on the inside of the bike....also, more brake brings the bike tighter, more gas wider...it is the gyroscopic effect of a highside, basically you aren't in the groove...