ok here is what is happening. i got a 94 cbr 900 rr. i never had this problem on any other bike i have been riding. i will do a back peg stand up i ride them out for about 70 feet then bam the back tire starts to wobble out of control! what is going on i can ride them out on the front pegs and i dont have this problem. can some one help?! thanks
shawn

 

check rear tire alighment and also just keep trying. mine used to do that too. it stopped as i got better.

 

easy fix- stay on the front pegs

 

Back pegs makes it more unstable your wieght is almost right over the rear axle so the shift of wieght is more sensitive. pay more attention to what your doing with your wieght

 

Throttle, youre probably very jerky on it