I am not to sure if you are familiar with DAX Motors. I bought the top and bottom end of an F80 2 stroke type D gen IV. if you go towards the bottom of this page http://www.thatsdax.com/ENGINE_KIT_PARTS_PAGE_3.html
you will see the motor.
And yes it is for a bicycle. I have some knowledge on how to build it. For instance, i know the piston clips/rings should be at a 12 o'clock or 6 o'clock position and to use a lot of syn 2 stroke oil in the cylinder and put some in the bottom end.