odd engine swaps

#1
any think of putting a street bike engine on a mini-bike?
has it been done yet and are ther any pics?

i used to own a K&S hornet rolling frame bout 15 years ended up moving and dont know what happend to it? that was going to be my plan for that frame
 
#2
I dont know anyone that has put one in a minibike but i know at my auto shop at school we dropped a brand new suzuki gsxr 1000 engine in a go kart and it is unbelievably fast.
 
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